Question

Let f (x) = a (x − 4)2 + 8.
(a) Write down the coordinates of the vertex of the curve of f.
(b) Given that f (7) = −10, find the value of a.
(c) Hence find the y-intercept of the curve of f.

Answer 1

@ prob B.. the value of a is -3

Answer 2

is it not raised to the power of 2?

Answer 3

yes its to the power of 2

Answer 4

if it is to the power of 2, the value of a is -2

Answer 5

Vertex is (4,8)