Question

Which of the following equations represents a parabola that opens up and has a vertex with a negative x-value? A. y=-2x^2+8 B. y=-x^2-5x-4 C. x^2+10x+24 D. x^2-7x+12

Answer 1

C

Explanation:

Open up = positive number that multiplies x^2

x - value of the vertex = -b/2a

C -> -10/2 = -5