#1**+1 **

Look at this, NSS

In the form

ax^2 + bx + c

The * x coordinate of the vertex* is given by -b / [ -2a ]

So we have

-2x^2 + 8x - 18

So......b = 8 and a = -2

So.......the x coordinate of the vertex is [ -8 ] / [ 2 * -2 ] = -8/-4 = 2

And the axis of symmetry has the same value ⇒ x = 2

We could find the y value of the function by putting 2 back into it, but we don't have to in this case

The first answer is the only one that makes sense

CPhill Nov 1, 2017