Chapter 15 Solve equation graphically.pptx

Solve equation graphically

1. Chapter 15 Solving Equation Graphically

2. Starter y = 3x + 5 y = 5x – 2 y = -2x + 7 y = ½x + 9 y = -¼x – 3 y = 4 y = x

3. Introduction

4. Form of a straight line   Gradient ‘steepness or slope’ y-intercept Where the graph crosses the y-axis When x = 0, what is y? y-intercept

5. Objectives Compare two equations Solve equations graphically.

6. Objective 1: Compare two equation L1: and L2 : Means y = 1 L1: and L2: Means y =0  

7. L1: L2: Means y =3 L1: L2: -1.5 L2: -1.5 Means y =-1.5  

8. Activity 1 Compare equation L1 with Given equations and find value of y. L2: L3: L4 :  

9. Objective 2: Solve equation Graphically a) means y =0   X = 1.7 b ) means y =3   X = -0.4 c ) means y =-1.5   X = 2.5

10. Activity 2

11. Q3 Page no. 269 1.9x = 4.42 2,7y +1.9x = 4.42 2.7y +4.42 = 4.42 2.27 y = 0 y = 0 b) 2.7y = 4.42 y = 4.42/ 2.7 y = 1.6

12. Plenary Summarize class in 2min challenge.

13. H.W. TND Page 269 Exercise 15D Q2 or Q4 TND Parallel Lines