Functions Review

Which relation describes a function? What makes it a function?

• {(-2,3),(-2,5),(-6,7)} Each member of the range is unique.

• {(2,3),(3,3),(3,4)} Each member of the domain and range is positive.

• {(2,3),(3,3),(3,4)} Each member of the domain and range is a real number.

• {(-2,3),(-3,3),(-4,3)} Each member of the domain is assigned exactly one member of the range.

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CCSS.HSF.IF.A.1

Which graph represents a function?

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CCSS.HSF.IF.A.1

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

Which table does NOT represent a function?

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CCSS.HSF.IF.A.1

CCSS.HSF.IF.B.4

Determine whether the relation shown here is a function. Explain your answer.

• function, an input has 1 output

• function, an input has 2 different outputs

• function, no output has 2 different inputs

• not a function, an input has 2 different outputs

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CCSS.HSF.IF.A.1

The cost of Nate’s service is described by y = 4x + 6. The table shows the cost of Beth’s service. Which service is cheaper for 8 movies in one month?

• Beth's service ($38 vs. $40) is cheaper
• Nate’s service ($42 vs. $44) is cheaper
• Nate’s service ($38 vs. $40) is cheaper
• Beth's service ($42 vs. $44) is cheaper

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CCSS.8.F.A.2

CCSS.HSF.IF.C.9

What has the GREATER rate of change.

• y = 7x + 10

• Someone who starts with $6 and gets $8 each day.

• y = 5x + 20

• Someone who starts with $8 and gets $6 each day.

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CCSS.HSF.LE.B.5

CCSS.HSS.ID.C.7

Is the function linear or nonlinear?
y = x² + 7

• Linear
• Nonlinear

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CCSS.HSA.CED.A.1

CCSS.HSA.REI.D.10

Is this function linear or nonlinear?

• Linear
• Nonlinear

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CCSS.HSF.IF.B.4

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

Is the equation linear or nonlinear?

• Linear
• Nonlinear

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CCSS.8.F.A.3

Is the equation linear or nonlinear?

• Linear
• Nonlinear

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CCSS.8.F.A.3