SOLUTION: how do you graph y=3x^3-9x?

Question 251579: how do you graph y=3x^3-9x?
Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
With a cubic equation, you have 2 changes of direction in the graph.
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Factoring you find

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So the x-intercepts are 0, and +/-sqrt(3).
The y-intercept occurs when x=0.
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Then build a table of values for x and y to graph it.
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The graph should look like...

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