Question

The linear function y = 1.2x represents Alberto’s speed, y, in meters per minute, when his stride rate is x steps per minute. Alberto’s average stride rate during a 10-kilometer race is 180 steps per minute.

What is Alberto’s average speed during the race?

Answer 1

y = 1.2x
y = meters per minute
x = steps per minute = 180
y = 1.2 (180)
y = 216 meters per minute

Answer 2

What is Alberto’s average speed during the race?

216 meters per minute

Based on the linear model, which is the best prediction of how long it will take Alberto to finish the 10-kilometer race?

B. 46 minutes