Question

What is the equation of the parabola? (3 points)

A) y = -1/8x^2 +5

B) y = 1/8x^2 +5

C) y = 1/8x^2 - 5

D) y = -1/8x^2 -5

Answer 1

A.

Explanation:

The parabola opens down, so the "a" value (the number in front of x^2) must be negative. The y-intercept is (0, 5) so the constant must be positive 5.