A circle has a radius of the square root of 13 and a center of -9.3, 4.1

1) The equation of the line of best fit is y = 0.3·x + 5

2) The time it would take a player that can complete 22 leg press repetitions to run 40 yards is 11.6 seconds

Step-by-step explanation:

1) The given data are;

Leg press (Reps):                     40-yard Dash Time

12                                                  8.6

32                                                 14.6

7                                                    7.1

11                                                   8.3

23                                                 11.9

28                                                  13.4

15                                                  9.5

From the attached graph we observe that with the data sorted in increasing order, there is a linear relation between the number of leg presses and the time to complete a 40 yard dash

The slope = (14.6 - 7.1)/(32 - 7) = 0.3

The equation of the line of best fit is the linear equation of the data given in point and slope form as follows;

y - 7.1 = 0.3×(x - 7)

y - 7.1 = 0.3·x - 2.1

The equation of the line of best fit is therefore;

y = 0.3·x + 5

Where;

y = The time to complete the 40-yard dash

x = The number of leg press completed

2) When x = 22, we have;

y = 0.3 × 22 + 5 = 11.6 seconds

If a player can do 22 leg-press repetitions, it would take the player 11.6 seconds to complete the 40 yard-dash.