Distance (miles) Time (hours)

7.5 1
15 2
22.5 3
30 4

The table represents the distance covered by Emma over several hours on a recent Saturday bike ride. Becky takes the same route, and the total distance she travels, y miles, in x hours is represented by the function y = 8x. Assuming that Emma and Becky travel at a constant rate of speed, which statement BEST compares their biking speeds?

Responses
A Emma and Becky travel at the same speed.Emma and Becky travel at the same speed.
B Emma travels 0.5 miles per hour faster than Becky.Emma travels 0.5 miles per hour faster than Becky.
C Emma travels 7 miles per hour faster than Becky.Emma travels 7 miles per hour faster than Becky.
D Becky travels 0.5 miles per hour faster than Emma.

D Becky travels 0.5 miles per hour faster than Emma.