Question

Marie orders a shuttle to the airport and learns that it will cost $15 plus $0.50 per mile. Write the equation of a linear function that models the relationship between number of miles and total coast of the shuttle.
A. y = 7.5x, where x is the number of miles and y is the total cost of the shuttle.
B. y = 0.5x + 15, where x is the number of miles and y is the total cost of the shuttle.
C. y = x + 7.5, where x is the number of miles and y is the total cost of the shuttle.
D. y = 15x + 0.5, where x is the number of miles and y is the total cost of the shuttle.

Answer 1

B. y = 0.5x + 15

Explanation: fixed base cost $15 plus $0.50 per mile, so total cost y = 15 + 0.5·(miles x).