Answer: See the description below.
The residuals are the difference between the actual and predicted values. Just subtract those values and plot the point.
Your points will be:
(2, 0)
(3, 4)
(4, -5)
(6, -1)
(7, 2)
18.84 I think you have to do the math from the radius to the edge of the circle
She walked 2.808 miles.
0.72 seconds ==> 0.00078 miles
0.72 minutes ==> 0.0468 miles
0.72 hours ==> 2.808 miles
Hope that helped.