Question

How do I do this please help

Answer 1

Explanation:

Vertex is (5,7)

then the vertex form of the parabola is :

f(x) = y = a ( x-5)^2 + 7 sub in the point (6,4) to calculate 'a'

4 = a ( 6-5)^2 + 7

4 = a + 7

- 3 = a

f(x) = - 3(x-5)^2 + 7