IXL - Complete a function table: quadratic functions (Algebra 2 practice)

or

Complete the table.

y = x² − 1
x	y
^–1
0
1
2

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or

Learn with an example

question

Complete the table.

y = x² − 9
x	y
^–3
^–1
1
3

solution

The first x-value in the table is ^–3. Evaluate y = x² − 9 for x = ^–3.

y	=	x² − 9

	=	(^–3)² − 9	Plug in x = ^–3

	=	9 − 9	Square

	=	0	Subtract

When x = ^–3, y = 0. Complete the first row of the table.

y = x² − 9
x	y
^–3	0
^–1	?
1	?
3	?

Next, evaluate y = x² − 9 for x = ^–1.

y	=	x² − 9

	=	(^–1)² − 9	Plug in x = ^–1

	=	1 − 9	Square

	=	^–8	Subtract

When x = ^–1, y = ^–8. Complete the second row of the table.

y = x² − 9
x	y
^–3	0
^–1	^–8
1	?
3	?

Complete the rest of the table the same way.

y = x² − 9
x	y
^–3	0
^–1	^–8
1	^–8
3	0

Looking for more? Try these:

Lesson: Quadratic functions

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Lesson: Quadratic functions