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Which statement best defines the domain of a relation?

• All possible x-values of the relation

• All possible y-values of the relation

• Only inputs that make y equal zero

• Only positive outputs of the relation

A set of ordered pairs is given: {(3, 4), (-2, 3), (7, 1), (-1.5, 4), (3, 1.5)}. Which x-value appears more than once, showing a possible function issue?

• x = -1.5 appears twice

• x = -2 appears twice

• x = 7 appears twice

• x = 3 appears twice

Tags

CCSS.8.F.A.1

A relation is a function if and only if which condition holds?

• No points lie on the x-axis

• Each y maps to exactly one x

• Each x maps to exactly one y

• All outputs are different numbers

Tags

CCSS.8.F.A.1

In a table, an input x is repeated with two different y-values. What conclusion is correct?

• The relation is always linear

• The relation has no domain

• The relation is not a function

• The relation must be quadratic

Tags

CCSS.8.F.A.1

Which set represents the range of the ordered pairs {(3, 4), (-2, 3), (7, 1), (-1.5, 4), (3, 1.5)}?

• {3, -2, 7, -1.5}

• {4, 3, 1, 4, 1.5}

• {4, 3, 1, 1.5}

• {1.5, -1.5, 3, 4}

You see a mapping diagram with arrows from x-values to y-values. Which feature proves it is a function?

• There are more x-values than y-values

• Every y has exactly one arrow

• Every x has exactly one arrow

• No arrows cross each other

Tags

CCSS.8.F.A.1

On a scatter plot of a relation, which quick visual test checks if it is a function of x?

• Vertical line test on the graph

• Horizontal line test on the graph

• Checking symmetry about y-axis

• Counting distinct output values

Tags

CCSS.8.F.A.1

A table shows x-values: 4, -1, 0, -5, 1, -2 and y-values: 12, -3, 4, -21, -3, 0. Which fact implies it is a function?

• Each x appears only once

• All inputs are negative

• The outputs are increasing

• Each y appears only once

Tags

CCSS.8.F.A.1

Given two different points share the same y-value in a relation, what must be true?

• It cannot be a function

• It can still be a function

• It has no range

• It must be linear

Tags

CCSS.8.F.A.1

Which description best defines the range of a relation?

• All possible outputs y-values

• Only the largest output value

• All numbers on the x-axis

• Only nonnegative inputs

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1