Write a quadratic function to model the graph to the right.

y = (x-4)² + 2  or x² -8x + 18

Step-by-step explanation:

vertex (h,k) = (4 , 2) and pass (0 , 18),  h = 4   k = 2

parabola equation: y = a(x-h)² + k

pass (0 , 18): 18 = a (0 - 4)² + 2 = 16a + 2

16a = 18-2 = 16

a = 1

equation: y = (x-4)² + 2  or x² -8x + 18

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i think you would have to divide the money he had saved, which is $2,000 by the time he plans on exercising which is 40 hours, and the answer you get should tell you the answer to your question.