> , < or = -36/8 __ -4.5

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36

Having a hard time understanding this question (see attachment).

Which is the focus of a parabola with equation y2=4x