Question

Explain how to determine whether the parabola opens up or down from the quadratic equation.?

Answer 1

The parabola opens up if the slope is positive
The parabola opens down if the slope is negative

Answer 2

if a is positive it opens up if it's negative it opens down
y=a(x-h)^2+k

Answer 3

If the slope is -2x^2, the parabola opens downwards
If the slope is 2x^2, the parabola opens up

Answer 4

y=a(x-h)^2+k
y=-a(x-h)^2+k