Question

Its vertex is (2,-4) and another point (-1,2) on the parabola Write an equation of the parabola.

Answer 1

Explanation:

Start with vertex form of the parabola

y = a ( x-2)^2 -4 then sub in the point (-1,2) to find the value of 'a'

2 = a ( -1-2)^2 - 4

so a = 2/3

y = 2/3 ( x-2)^2 -4