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

miles traveled
miles traveled

speed traveled
speed traveled

time in hours

Answer 1

time in hours

Explanation: In y = 80x + 2, the slope 80 has units miles/hour, so x must be hours (time).