Bar graph power point presentation grade 7

Graph

1. G R A P H Sing it! Sing it! Sing it! Sing it! Sing it! Guess the Title

2. Math 7, Quarter 3, Week 3 GRAPHS

3. Frequency Distribution Table Graphical Representation of Data Interpretation of Statistical Graph CONTENT/LESSONS

4. DAY 1

5. 38, 45, 48, 13, 35, 46, 21, 18, 19, 32, 33, 31, 33, 19, 30, 33, 39, 46, 48, 47, 18, 24, 44, 48, 37, 32, 21, 24, 25, 28 Below are the results of the 50-item test of Grade 7 class in English. Construct a frequency distribution. SHORT REVIEW

6. 1. Why do we need to use graphs in presenting a set of data? Guide Questions: LESSON PURPOSE 2. How do we choose the best type of graph suited to present a set of data?

7. Statistical Graphs or Charts are visual representations of statistical data. These graphs are utilized to illustrate a data set, making it simpler to understand and interpret the information. UNLOCKING CONTENT AREA VOCABULARY

8. SUB-TOPIC 1: BAR GRAPH

9. Bar Graph EXPILICITATION

10. is a data presentation tool that uses bars with different heights and lengths. Bar Graph EXPILICITATION To create a bar graph, plot the frequencies against the categories.

11. Mrs. Ignacio wanted to present his weekly sales in an easier way for her boss. The frequency distribution table is presented below. If her boss wanted her to present it using a bar graph, what would her graph look like? WORKED EXAMPLE

12. Based on the given table, we can conclude that each category is best described by its frequencies. Remember that in a bar graph, the height or length of the bar represents how frequently a specific category was seen. The height of each bar represents the equivalent frequency for each category. Hence, to communicate this data to her boss, we can create a bar graph to help her comprehend better color pen sales. WORKED EXAMPLE Solution:

13. The bar graph shows which color pen sells the most and which sells the least. Moreover, a bar graph can show the difference in sales between each color pen. To create a bar graph, plot the frequency against the categories, as illustrated in the slide. WORKED EXAMPLE Solution:

14. WORKED EXAMPLE Result:

15. Watch and Learn

16. 1. A store of fruit juice recorded the number of glasses sold in a day. Create a bar graph and answer the following questions. LESSON ACTIVITY Activity 1: Juice Store Sales!

17. LESSON ACTIVITY 1. What juice sold the most? 2. What juice sold the least? 3. How many glasses of apple juice were sold? 4. How many more glasses of grape juice were sold than lemon juice? 5. How many glasses of orange and apple juice together were sold? 6. How many glasses were sold in all? Questions:

18. DAY 2

19. 1 . Bar graph should always have labeled axes to explain what each axis represents. 2 . In a bar graph, the bars should be equally spaced and of the same height. 3 . The length or height of a bar in a bar graph represents the value for that category. SHORT REVIEW 5 . It’s unnecessary to label each bar with its exact value because viewers can estimate the value based on bar height. 4 . The baseline of a bar graph should generally start at zero to avoid misleading

20. SUB-TOPIC 2: LINE GRAPH

21. EXPLICITATION The line graph makes use of lines and dots to show a potential future pattern or trend. Plotting the time (horizontal) against the observed phenomenon (vertical) and then connecting the two with lines is the way to create a line graph. Future events might then be predicted using this pattern. Line graph works well for presenting time series. The graph on the right is an example of a line graph Line Graph

22. WORKED EXAMPLE Mr. Dela Cruz's manager wanted to know (and see more easily) whether their banana sales had increased or decreased. Determine if sales increased or decreased for seven months using the data provided below.

23. WORKED EXAMPLE The provided data is an example of a time-dependent series. Remember that a line graph uses dots and lines to reveal a pattern or trend that may continue in the future . Solution: This means that line graphs are best suited to time series.

24. WORKED EXAMPLE The line graph may simply show us the sales trends over a certain time period. It also allows us to forecast sales for the next few months. Solution: To create a line graph, plot the time (horizontal) against the observed phenomena (vertical) and connect the two with lines. This pattern might then be utilized to forecast upcoming events.

25. WORKED EXAMPLE Solution:

26. Watch and Learn

27. LESSON ACTIVITY Activity 2: Create a line graph out of the data below:

28. SUB-TOPIC 3: STEM AND LEAF PLOT

29. EXPLICITATION Stem and Leaf Plot is a unique table in which each data value is divided into a "stem" (the first digit or digits) and a "leaf" (typically the last digit).

30. WORKED EXAMPLE Given the data below, make a stem and leaf plot out of it. 12, 13, 15, 20, 21, 22, 22, 24, 24, 31, 32, 40 The "stem" values are listed first, followed by the "leaf" values, which are arranged right (or left) of the stem values. The "stem" is used to group the results, and each "leaf" displays the individual scores for each group.

31. WORKED EXAMPLE Given the data below, make a stem and leaf plot out of it. 12, 13, 15, 20, 21, 22, 22, 24, 24, 31, 32, 40 STEM LEAF 1 2 3 4 2 3 5 1 2 2 4 4 1 2

32. LESSON ACTIVITY Activity 3: Bong got his friends to do a long jump and got the ff. results: 2.5, 2.6, 2.6, 2.7, 2.8 3.1, 3.5, 3.6, 4.3, 5.1 a. Create a stem and leaf plot. b. Explain the distribution of the stem and leaf plot. STEM LEAF

33. DAY 3

34. 1 . Line graphs are ideal for comparing categories, such as different types of fruits. 2 . To make a line graph, you need to connect data points with a series of bars. 3 . Line graphs are good for showing trends, like an increase or decrease over a period. SHORT REVIEW 5 . Line graphs should not have any gaps between data points, even if data is missing. 4 . A line graph is best used to show changes over time

35. From the following stem and leaf, give all possible scores of the students in a summative test SHORT REVIEW STEM LEAF 1 1 3 3 4 4 7 8 2 0 0 5 5 8 9 3 1 2 2 4 4 4 6 6 7 4 0 1 1 2 3 3 3 8 12, 13, 13, 14, 14, 17, 18, 20, 20, 25, 25, 28, 29, 31, 32, 32, 34, 34, 34, 36, 36, 37, 40, 41, 41, 42, 43, 43, 43, 48 ANSWER:

36. SUB-TOPIC 3: INTERPRETATION OF STATISTICAL GRAPHS

37. Statistical Graph is one of the most significant components of data presentation and analysis to expose structure and trends. Moreover, statistical graphs enable data to be displayed in various visual formats. In this lesson, you will learn to recognize the key elements of a statistical graph and how to interpret the data presented within it. EXPLICITATION

38. WORKED EXAMPLE Graph Title - The first component of a graph which tells what the graph is about. Graph Axis Label – The second component of a graph that the x-axis, which goes left to right horizontally, and the y-axis, which goes up and down vertically. Major Components of a Statistical Graph

39. WORKED EXAMPLE Graph Units - The third component of a graph in which are the units presented on the two axes. Graph Data – The fourth component of a graph that can be presented in many different forms, such as bars, dot, lines, or other representations Major Components of a Statistical Graph

40. Major Components of a Statistical Graph EXPLICITATION

41. The graph displays the number of days each type of weather occurred in a month. To better understand what the graph means, we first need to locate the units on the two-axis labels.

42. The height of the bars shows the number of days each type of weather occurred in the month. In the graph, rainy days have the highest number with 10 days, and cloudy days have the lowest with 3 days.

43. WORKED EXAMPLE 1. Which month has the highest number of student birthdays? 2. How many student birthdays are in February? 3. Which two months have the same number of student birthdays? 4. What is the total number of student birthdays in May & June combined? June 4 Jan & Apr May & Oct Sep & Dec 18 Feb & Nov A. Teacher Anna constructed a bar graph to show the number of students with birthdays in each month

44. WORKED EXAMPLE A. Teacher Anna constructed a bar graph to show the number of students with birthdays in each month INTERPRETATION: From the graph, June has the highest number of student birthdays (10), while August has the fewest (1). Other months vary, with October and December also having relatively high counts.

45. B. A machine salesman wants to present the monthly sales of their company during the marketing review of their company. WORKED EXAMPLE He constructed a line graph as shown below but he was a little bit confused when analyzing the data. Help the salesman interpret the graphical data by answering the questions below.

46. WORKED EXAMPLE 1. Which month has the lowest number of machines sold? 2. What is the highest number of machines sold? 3. Which months have the same number of machines sold? May 50 Jan & Jun Feb & Apr

47. The graph above shows the number of machines sold over six months. Based on the graph, the month of May has the lowest number of machines sold. Moreover, within these six months, the highest number of machines sold is 50, occurring in the months of January and June. INTERPRETATION: WORKED EXAMPLE

48. Activity 4: Let the learners answer the following activities. LESSON ACTIVITY 1. Eight teams joined a quiz competition. Their final scores are shown below. Study the graph, answer the questions, and write a short interpretation.

49. LESSON ACTIVITY a. Which team won the contest? b. How many points did Team F score? c. How many more points did Team D get than Team G? d. Which teams scored equally? e. What is the difference in the amount of points Team E scored and the amount Team H scored? f. How many teams scored fewer than 100 points? g. What are the average points of the top 3 highest teams?

50. LESSON ACTIVITY INTERPRETATION:

51. Activity 4: Let the learners answer the following activities. LESSON ACTIVITY 2. A bookshop made a line graph of the number of books it sold each week during a certain period. Based on the information provided in the line graph below, answer the questions below and write a short interpretation of the graph.

52. LESSON ACTIVITY a. Which week has the lowest number of books sold? b. What is the highest number of books sold? c. Which weeks have the same number of books sold?

53. LESSON ACTIVITY INTERPRETATION:

54. Fill-Me-In. To answer the following questions, fill in the graphic organizer below. 1. Why do we need to use graphs in presenting a set of data? 2. How do we choose the best type of graph suited to present a set of data? LEARNER’S TAKEAWAYS

55. DAY 4

56. FORMATIVE ASSESSMENT 1. Bayani’s boss wanted to know if the sales of their fruits were in a month. The data is presented below. Help Bayani to present the fruit sales easily to his boss. a. Construct a bar graph based on the data above. b. Write a short interpretation of the data based on the constructed bar graph.

57. FORMATIVE ASSESSMENT 2. The data below describes the progress of the reading ability (rating of 1-10) of the Grade 2 students at an elementary school from June to December. a. Construct a bar graph based on the data above. b. Write a short interpretation of the data based on the constructed bar graph.

58. FORMATIVE ASSESSMENT 3. Gina has been collecting anime cards. Sometimes, when she bought a new packet, she found cards that she had already collected. She created a table to show the number of repeated cards in the packs she opened. QUESTIONS: a. How many times has a card been repeated twice in the opened packs? b. How many times are there no repeated cards? c. What is the number of repeats with the same frequency? d. What is the least number of times that a card has been repeated? INTERPRETATION: