IXL - Graph parabolas (Precalculus practice)

Graph the parabola

–

(

)

Plot the vertex. Then plot another point on the parabola. If you make a mistake, you can erase your parabola by selecting the second point and placing it on top of the first.

Coordinate plane graph with 4 quadrants, x-axis coordinates from -10 to 10, y-axis coordinates from -10 to 10.

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Learn with an example

question

Graph the parabola

–

Plot the vertex. Then plot another point on the parabola. If you make a mistake, you can erase your parabola by selecting the second point and placing it on top of the first.

key idea

The vertex form of a parabola that opens right or left is

(

–

)

The vertex is

(

)

the parabola opens right. If

the parabola opens left.

solution

To graph the parabola, first find the vertex.

–

(

–

)

The vertex is

(

)

Now look for another point on the parabola with integer or half-integer coordinates. One such point is

(

)

(Plugging in

yields

So, plot this point.

Looking for more? Try this:

$Confetti$

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Teacher tools

Work it out

Not feeling ready yet? This can help:

U.2Write equations of parabolas in vertex form

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