Explain what the slope and y-intercept of the linear model represent in the context of the situation.

Answer:

The slope of the linear model is 1.2, which represents Alberto's stride length in meters per step; for every additional step per minute, his speed increases by 1.2 meters per minute. The y-intercept is 0, which means that when his stride rate is 0 steps per minute, his speed is 0 meters per minute.