Question

8.
Find the vertex of the parabola formed by the following quadratic function: y = -3x2 + 12x - 7


A. (-2,-43)
B. (2, 5)
C. (-1, -22)
D. (1, 2)

Answer 1

Complete the square and rewrite the function in vertex form.

Answer 2

http://openstudy.com/study#/updates/53445318e4b087c1969c244e

Answer 3

When you have the parabola in standard form \(y = ax^2 + bx +c\), the x-coordinate of the vertex is at \(\large-\frac{b}{2a}\) and you can find the y-coordinate by plugging that into the equation as \(x\).