A graph of a quadratic function is shown below.

graph of y equals negative 2 times x squared plus 40 x plus 600

What is the vertex of the parabola shown?

(30, 0)
(800, 10)
(0, 600)
(10, 800)

Question

A graph of a quadratic function is shown below. 

graph of y equals negative 2 times x squared plus 40 x plus 600

What is the vertex of the parabola shown?

 (30, 0)
 (800, 10)
 (0, 600)
 (10, 800)

nnesha · Answer

$$\huge\rm y=-2x^2+40x+600$$ formula to find x-coordinate of the vertex $$\huge\rm x= -\frac{ b }{ 2a }$$
then substitute x  for its value into the original equation  to find y-coordinate $$\huge\rm Ax^2+Bx+C=0$$
a=leading coefficient
b=middle term