SOLUTION: how do you determine if a quadratic function opens upward or downward?

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Question 372448: how do you determine if a quadratic function opens upward or downward?
Answer by marcsam823(57) About Me  (Show Source):
You can put this solution on YOUR website!
Look at the sign of the x%5E2 term. If it is positive, the parabola opens upward; if it is negative, it opens downward.