Question

The scatter plot shows the relationship between the time since Martha has left work and the distance she is from home.

The equation for the line of best fits is y=-0.7x + 14.6

What does the slope of the line best fit represent?


A. On average each minute Martha gets approximately 0.7 miles closer to home.

B. On average each minute Martha get approximately 0.7 miles farther from home.

C. When Martha first leaves work she is approximately 0.7 miles from home.

D. When Martha first leaves work she is approximately 0.7 minuets from home

Answer 1

The correct answer is A.

The independent variable is time and the dependent variable is distance; this means the slope tells us how far she goes per minute. Since the slope is negative and we are referring to her distance from her house, this means the distance from her house is decreasing, which means she is getting closer to her house.