SOLUTION: how can you tell if the vertex is the max or min of a quadratic function?

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Question 747031: how can you tell if the vertex is the max or min of a quadratic function?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The coefficient on the x^2 term tells you. If this coefficient is positive, the parabola has a minimum; and if this coefficient is negative, the parabola has a maximum.