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Pearson Algebra 1 Common Core, 2011 View details

1. Quadratic Graphs and Their Properties

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Exercise 24 Page 550

Make a table of values and connect the points with a parabola.

Graph:

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We want to graph the given quadratic function. y=- 2x^2+4To do so, we will first make a table of values.

x	- 2x^2+4	y=- 2x^2+4
0	- 2( 0)^2+4	4
2	- 2( 2)^2+4	-4
4	- 2( 4)^2+4	- 28

Note that since the given function has the form y=ax^2+c the axis of symmetry is the vertical line x= 0. Now, let's plot the obtained points and their reflections across the axis of symmetry. Then we can connect them with a parabola.