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 $98.50 for 210 miles. On another day

Question 1019459: 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 $98.50 for 210 miles. On another day she rented a car from the same agency and paid $140.50 for 330 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.
Can you please help me solve this. Thank you.
Answer by MathTherapy(10556) (Show Source): You can put this solution on YOUR website!

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 $98.50 for 210 miles. On another day she rented a car from the same agency and paid $140.50 for 330 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.
Can you please help me solve this. Thank you.

The scenario indicates 2 points: (210, 98.5) and (330, 140.5)

Slope (m) of function:  ---->  ------ Substituting  -----> 

 ----------- Point-slope form

 ---- Substituting 



 ------ Adding 98.5 to both sides







 

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