The equation of a parabola is 18 (y-5) 2=x+3.

What are the coordinates of the focus?

(-5, 5)

(-3, 3)

(-1, 5)

(-3, 7)

1/8 (y-5) ²=x+3

(y-5) ² = 8 (x+3)

The formula of parabola in standard form

(y-k) ² = 4p (x-h), (h, k) - vertex, (h+p, k) focus

For our parabola

vertex (-3,5)

4p=8

p=2

This is a horizontal parabola because y².

So to find the coordinates of the focus we need to add to x coordinate of vertex.

(-3+2, 5) = (-1,5) focus

Correct answer is (-1,5).