Functional Reasoning Review

Which statement BEST explains why the graphed relation is NOT a function?

• The graphed relation is not a line.

• There are infinitely many points on the graph.

• The domain of the graph does not include all real numbers.

• There are points on the graph with the same x-coordinate but different y-coordinates.

Which relation below is a function?

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Tags

CCSS.8.F.A.1

The graph below displays a relation between x and y. This relation does NOT define y as a function of x because ____.

• the relation is not linear.

• points (2, 2) and (3, 2) have the same y-value.

• points (3, 2) and (3, 3) have the same x-value.

• several points have equal x- and y-values.

Tags

CCSS.8.F.A.1

In which set of ordered pairs, (x, y), is y NOT a function of x?

• {(4,3), (3, 4)}

• {(4, 3), (7, 3)}

• {(7, 4), (4, 7), (4, 3)}

• {(7, 7), (4, 4), (3, 3)}

Tags

CCSS.8.F.A.1

The ordered pairs (x,y) define the relation Q.

Q: {(4, 5), (3, 2), (5, 5), (2, -3)}

Is Q a function?

• Yes, because there is exactly one x-value for every y-value.

• Yes, because there is exactly one y-value for every x-value.

• No, because there is more than one x-value for some y-values.

• No, because there is more than one y-value for every x-value.

Tags

CCSS.8.F.A.1

Which ordered pair (x, y) makes the relation a function?

{(3, 4), (-2, 6), (5, 5), (-4, 6), (x, y)}

• (-4, 4)

• (-2, 5)

• (0, 6)

• (3, 6)

Tags

CCSS.8.F.A.1

Which graph is an example of a function?

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Which relation below is NOT a function?

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Tags

CCSS.8.F.A.1

Which relation below is NOT a function?

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Tags

CCSS.8.F.A.1

The sets of ordered pairs below represent relations.

I {(0, 0), (1, 1), (2, 2), (3, 3), (4, 4)}

II {(1, 2), (2, 1), (1, 3), (0, 1), (3, 1)}

III {(0, 2), (1, 2), (2, 4), (3, 4), (3, 6)}

IV {(1, 6), (2, 6), (3, 6), (4, 6), (5, 6)}

Which of these sets are also functions?

• I only

• I and IV

• II and III

• II, III, and IV

Tags

CCSS.8.F.A.1