Question

what are the coordinates of the vertex of y = x^2 - 2x - 7
(-1, -7)
(-1, -4)
(1, -8)
(1, -7)

Answer 1

The simplest way is to find the point where the derivative of the function f(x) = y is zero.
The derivative is f'(x) = 2x - 2. Set this to zero and solve for x.

Answer 2

sooo....-1,-4?

Answer 3

how can it be -1? try again.
2x-2 = 0

Answer 4

1,-8

Answer 5

correct!

Answer 6

thank you!

Answer 7

you are welcome. you can close the question now!