Identifying Functions

Which set of ordered pairs represents y as a function of x?

• {(-1,4),(-2,-5),(-3,1),(-4,9),(-3,8)}

• {(0,0),(1,3),(2,8),(3,27),(4,30)}

• {(0.5,-3),(0.6,-5),(0.7,-7),(0.8,-9),(0.5,-11)}

• {(-7,3.5),(-7,3),(-7,2.5),(-7,2),(-7,1.5)}

Tags

CCSS.8.F.A.1

Which of the following does NOT represent y as a function of x?

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Does the mapping shown represent y as a function of x?

• Yes, because each x value is paired with exactly one y-value.

• No, because an x-value is paired with two y-values.

• Yes, because each y-value is paired with exactly one x-value.

• No, because a y-value is paired with two x-values.

Tags

CCSS.8.F.A.1

Which of the following represents y as a function of x?

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Which of these tables represents y as a function of x?

• A

• B

• C

• D

Tags

CCSS.8.F.A.1

Which graph represents y as a function of x?

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Which representation does NOT show y as a function of x?

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Tags

CCSS.8.F.A.1

Which set of ordered pairs does NOT represent y as a function of x?

• {(0,4),(2,4),(4,4),(6,4),(8,4)}

• {(-3,-0.5),(-2,-1.5),(-1,-2),(0,-2.5),(-3,-4)}

• {(-3,1),(-2,4),(-1,6),(0,5),(1,2)}

• {(-3,0),(-2,1),(0,2),(6,3),(8,4)}

Tags

CCSS.8.F.A.1

Which mapping shows y as a function of x?

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Tags

CCSS.8.F.A.1

Which statement describes the mapping?

• The mapping does not represent y as a function of x, because a value of x is associated with two different corresponding values of y.

• The mapping represents y as a function of x, because each value of x is associated with a single value of y.

• The mapping represents y as a function of x, because each value of y is associated with a single value of x.

• The mapping does not represent y as a function of x, because two of the values of x are associated with a single value of y.

Tags

CCSS.8.F.A.1