A graph of a quadratic function is shown below.

graph of y equals minus 2 times the square of x plus 40 times x plus 600 What is the vertex of the parabola shown?

a (30, 0)

b (800, 10)

c (0, 600)

d (10, 800)

A graph of a quadratic function is shown below graph of y equals minus 2 times the square of x plus 40 times x plus 600 What is the vertex of the parabola shown class=