Question

Explain in a well-developed sentence how we can determine if a parabola opens up or down.

Answer 1

look at the sing with x
if it is negative then the parabola looks down -x^2
if positive then up x^2

Answer 2

if the coefficient in front of \(\large\color{black}{ x^2 }\) is positive, then opens up, if negative, then opens down.