Question

What are the coordinates of the vertex of `y = x^2-2x-7`?

Answer 1

`(1,-8)`

Explanation:

The x-value of the vertex will always be `(-b)/(2a)`,
b is -2 and a is 1 in this case, so the x coordinate is 1
Plug in x=1 to get the y coordinate:
`1^2 - 2(1) - 7 = -8`
vertex is `(1,-8)`