Question

A graph of the function y=80x+2
models Carli’s road trip, with her speed measured in miles per hour. The graph includes the two hours of stops she’ll make. Using this information, define which quantity describes the x-axis.(1 point)
Responses

direction traveled
direction traveled

speed traveled
speed traveled

time in hours
time in hours

miles traveled

Answer 1

time in hours

Reason: The slope 80 has units miles per hour, so multiplying by x gives miles; thus x represents time (in hours).