SOLUTION: How do I determine the graph of the quadratic equation y = -10x2 + 9. Can you please help me?

Question 453551: How do I determine the graph of the quadratic equation y = -10x2 + 9. Can you please help me?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How do I determine the graph of the quadratic equation y = -10x^2 + 9
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y-intercept = ?
Let x = 0, then y = 9 gives you point (0,9)
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x-intercepts = ?
Let y = 0,
Then -10x^2 + 9 = 0
x^2 = 9/10
x = +/- sqrt(9/10)
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Gives you points: (sqrt(9/10),0) and (-sqrt(9/10),0)
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Plot those intercepts and draw a parabola thru them:
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Cheers,
Stan H.
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