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13 votes
13 votes
Use the parabola tool to graph the quadratic function f(x)=−(x−3)(x+1).

Graph the parabola by first plotting its vertex and then plotting a second point on the parabola.

User Nrw
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1 Answer

19 votes
19 votes

The parabola has roots at x=3 and x=-1, so its vertex is halfway between those points, at x=1, and so the y-coordinate of the vertex is -(1-3)(1+1)=4.

Another point that lies on the parabola is (-1, 0).

Use the parabola tool to graph the quadratic function f(x)=−(x−3)(x+1). Graph the-example-1
User Denis Sergeev
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2.7k points
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