Question

Part A: complete the table below and graph function on the same coordinate system abovePart B: his teacher marked it incorrect. Explain why Pierre’s work was counted incorrect

Answer 1

f(x)= -x^2 + 8x

Replace each value of x given in the table and solve for f(x)

x=0 , F(0) =-0^2+8(0) = 0

x= 1 , f(1)= -1^2 + 8(1)= -1 + 8 = 7

x= 2 ,f(2) = 12

x=3 ,f(3)= 15

x= 4 , f(4)= 16

x= 5 , f(5)= 15

x=6 , f(6) = 12

x=7 , f(7) = 7

x=8, f(8)= 0

Graph:

Part B:

He graphed the wrong way, first, he only marked the points but didn't join them by a line.

And the parabola opens in the wrong way.