Question

Please help!! :)
Write an equation for a parabola with vertex (-6,2) that is congruent to y=1/2x^2 and opens down.

Answer 1

do you know the vertex form of the equation of a parabola?

Answer 2

You could look at this
http://www.mathwarehouse.com/geometry/parabola/standard-and-vertex-form.php

when the questions asks for is congruent to y=1/2x^2
I think that means "a" (see link for what "a" is in the formula) is 1/2
h and k in the formula are the x and y of the vertex