Question

The function y=3.75+1.5(x−1)
can be used to determine the cost in dollars for a taxi ride of x miles. What is the rate of change of the cost in dollars with respect to the number of miles?(1 point)

$1.50 per mile

$3.75 per mile

$4.25 per mile

$5.25 per mile

Answer 1

1.50 per mile

The rate of change is the coefficient of x; y = 3.75 + 1.5(x − 1) simplifies to y = 1.5x + 2.25, so the slope is $1.50 per mile.