Question

A motor car race is 500 miles long and consists of completing laps of a circular speedway that has a circumference of 2.5 miles. For which of these functions does y represent the number of miles a motor car has left to go in the race if x represent the number of laps completed by the motor car? PLEASE HELP ME PLEASE

Answer 1

Let

x -----> the number of laps completed by the motor car

y -----> the number of miles a motor car has left to go in the race

we have that

one lap is 2.5 miles

so

y=-2.5x+500

answer is option B

because

For x=0 y=500 (initial value)

its a decreasing function (slope negative)