Question

PLEASE HELP ME!! 25 POINTS!!!

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 fit is y = -0.7x + 14.6
What does the y-intercept of the line of best fit represent?

a) On average each minute Martha gets approximately 14.6 miles closer to home.
b) On average each minute Martha gets approximately 14.6 miles father from home.
c) When Martha first leaves work she is approximately 14.6 miles from home.
d) When Martha first leaves work she is approximately 14.6 minutes from home.

Answer 1

C. The y-intercept represents how far away she is at time = 0, meaning before she started traveling home. Therefore it must be a single value rather than a per-minute rate, and it must be measured in miles since it's a measure of distance. C is the only answer that fits.