# SAT Math Question (6) - Functions

SAT Math tests generally have a lot of function related problems. These questions are usually very simple, just a plug in the x to get a y or vice versa, that some people have trouble with because they don't understand that. Here are a few questions that could be asked.

#### Example 1 (Easy-Medium)

The temperature in Toronto is 56°F. Find the temperature in kelvins with the given function:

#### Solution:

First, C(F) just means your answer. It is just a function that gives the value of C given an F value. So, plug in F = 56 and simplify.

#### Example 2 (Hard)

A company rents cars at $25 per day plus a $50 renters fee. The company made $675 on a rental. Make a function that models the profit (P), where x is number of days, and find how many days the car was rented.

#### Solution:

Well to make the function think of how muck they make after 1 day, 2 days, until you see a pattern. Notice there is an automatic $50 fee, so we add that on. Every day there is a $25 fee, so that is our multiplier. We can build the following equation:

Now, we plug in 675 into P(x) and solve.

fahad290 (49)7 years agogreat post really interesting like it and upvoted!

hansenator (57)7 years agoThank you fahad290! Hope all is well for you! More to come!

steemiteducation (72)7 years agoslempase (65)7 years agoGood post

hansenator (57)7 years agoThank you slempase!