Question

The odometer in a car measures the number of miles driven by the car since it was made. During a trip, the odometer reading in Anita’s car is modeled by the function y=9500+55x, where x represents the number of hours driven during the trip and y represents the odometer reading in miles.
Part A

What is the meaning of the rate of change in this function?


The number of miles driven each hour during the trip.

The total number of miles driven at the beginning of the trip.

The total number of miles driven at the end of the trip.

The number of miles driven during the trip.
Question 2
Part B

What was the odometer reading, in miles, before Anita’s trip?

Answer 1

Answer:

Step-by-step explanation:

Part A

The units on 9500 must be miles. So if x is time, then 55 must be the rate at which she travels ie 55 miles per hour. So the answer must be A.

Part B

The trip began when the time was zero. Therefore x is zero. What remains is the mileage on the odometer when x = 0.  The answer must be 1950.