What is the range of the function f (x) = 3x2 + 6x - 8?

y

y

y

y

f (x) is a quadratic equation with the x-side squared and a is positive which means that the graph of the function is a parabola facing up. The range of f (x) is given by y, where k is the y-coordinate of the vertex.

, written in vertex form is

, where (h, k) = (-1, - 11)

Therefore, range = y