Question

Describe the graph of the function. y = 9x^2 + 18x – 6 1.) The graph is a parabola with axis of symmetry at x = 1. 2.)The graph is a parabola with axis of symmetry at x = 9. 3.)The graph is a parabola with axis of symmetry at x = 6. 4.)The graph is a parabola with axis of symmetry at x = –1.

Answer 1

The correct answer is D! When graphed, you can see a parabola with an axis of symmetry at -1.

Answer 2

The graph is a parabola with axis of symmetry at x = –1

Explanation:

the graph of the function.
`y = 9x^2 + 18x - 6 1`

To find axis of symmetry we use formula

`x=(-b)/(2a)`

given equation is in the form of y=ax^2+bx+c

a= 9, b= 18 and c= 61

plug in the values in the formula

`x=(-b)/(2a)`

`x=(-18)/(2(9))=-1`

So, axis of symmetry at x=1