SOLUTION: Suppose that a car rental agency charges a fixed amount per day plus an amount per mile for renting a car. Heidi rented a car one day and paid $60 for 200 miles. On another day she

Question 1165181: Suppose that a car rental agency charges a fixed amount per day plus an amount per mile for renting a car. Heidi rented a car one day and paid $60 for 200 miles. On another day she rented a car from the same agency and paid $84 for 360 miles. Find the linear function f(x) (where x is in miles and f(x) is in dollars) that the agency could use to determine its daily rental charges.
Answer by Seutip(231) (Show Source): You can put this solution on YOUR website!
Let:
a - be the fixed amount per day
b - amount per mile for renting a car
Day 1

Day 2

Given two equations and
We can solve a=30 and b=0.15 through this
and

substituting
we get a=30
Now we know that you pay $30 when you rent per day and $0.15 per succeeding miles. The linear function f(x) that the agency could use to determine its daily rental charges is:
f(x) = $3 + $0.15 x
(where x is in miles and f(x) is in dollars)

HI HOPE THAT HELPS!

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