How will the graph of y = x2 + 2 change if the equation was changed to y = x2 + 8

If a graph is in slope intercept form y = mx + b, the m is the slope and the b is the y-intercept. The y-intercept shifts the graph up or down.
The value of b in  is 2, so 2 is the y-intercept.

The value of b in  is 8, so 8 is the y-intercept.

However, both graphs' slopes (value of m) are the same therefore in y=2x+8 the graph is just shifted 6 units up.

15/20 = mph/60

60 x 15 = 20 x mph

900 = 20 x mph

900/20 = mph

45mph is your answer.