Question

Find the vertex of the parabola.

y = x2 - 16x + 73

A. (8, 9)

B. (9, 8)

C. (0, 8)

D. (9, 0)

Answer 1

Take the derivative: 2x-16
Set it equal to zero... 2x-16=0

We find the x=8
Plug x=8 into the original equation...
8^2 -(16*8)+73=9

so...y=9 and x=8

Answer 2

i dont get it

Answer 3

oh now i do lol

Answer 4

To take the derivative for these types of functions...
If you have x^2, just move the 2 down in front... 2x
and 16x is just 16. 99x is just 99. 1000x is 1000.