Question

98. Explain in your own words, how you can tell from its equation whether a parabola opens up, down, left or right.

Answer 1

The same way you tell if a parabola opens up or down, by the leading coefficient of the variable.

Explanation:

Since the x-axis is positive to the right, a positive leading coefficient (3) means it opens to the right. eg. And a negative leading coefficient (-2) means it opens to the left.