Function word problems

Writing the equation and labeling the variables

1. Labeling Variables
Write the function and label the variables

2. What is missing?
●When you are asked to write a function and
label the variables, make sure you label
both!!!!
●Take a look at the slides with word
problems and the answers on the following
slides.

3. Word problem #1
●Mark is buying his favorite comics for $2.
He starts off with $187 in his account. Write
a function to represent this situation and
label the variables.

4. Answer to #1
●f(x)=187-2x (or f(x) = -2x+187)
●The x represents the number of comics he
buys.
●The f(x) represents how much money he
has left.

5. Word Problem #2
●Annie is helping her mom collect canned
goods. He mom has 91 cans and Annie is
collecting 10 cans a week. Write a function
to represent this situation and label the
variables.

6. Answer to #2
●f(x) = 10x+91 (or f(x)=91+10x)
●The x represents the number of weeks that
go by.
●The f(x) represents the number of cans
collected

7. Answer to #2
●f(x) = 10x+91 (or f(x)=91+10x)
●The x represents the number of weeks that
go by.
●The f(x) represents the number of cans
collected