SOLUTION: Does this parabola open upward or downward? How do you know? y=-3x^2

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Question 618931: Does this parabola open upward or downward? How do you know?
y=-3x^2

Answer by mananth(16946)   (Show Source): You can put this solution on YOUR website!
The co-efficient of x^2 is negative.
So the graph opens downward

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