This document discusses labeling variables in functions. It provides examples of word problems and their corresponding functions with labeled variables. The first problem is about a person buying comics for $2 each from an initial $187. The function is f(x)=187-2x, where x is the number of comics bought and f(x) is the amount of money left. The second problem is about collecting canned goods, with an initial 91 cans and collecting 10 cans per week. The function is f(x)=10x+91, where x is the number of weeks and f(x) is the number of cans collected. The document emphasizes the importance of labeling both variables in a function.
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
