General Mathematics - Quarterly Review

Which graph represents a function?

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Answer explanation

The vertical line test can be used to determine whether a graph represents a function.

Which graph represents a function?

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Which of the following sets of ordered pairs represents a one-to-one function?

• {(1, 2), (2, 2), (3, 2)}

• {(1, 2), (2, 3), (3, 4)}

• {(1, 2), (1, 3), (2, 4)}

• {(1, 2), (2, 3), (2, 4)}

Which of the following sets of ordered pairs represents a one-to-one function?

• {(1, 5), (2, 5), (3, 6)}

• {(0, 1), (2, 3), (4, 5)}

• {(1, 2), (2, 3), (3, 3)}

• {(2, 4), (2, 5), (3, 6)}

Determine the correct classification:

• Rational Equation

• Rational Inequality

• Rational Function

• Neither

Given the set of ordered pairs {(1,3),(2,6),(3,9)}, which of the following function rules correctly describes the relationship between x and y?

• y = 2x + 1

• y = 3x

• y = x + 2

Answer explanation

Substitute the values of x and check whether they result in the correct corresponding values of y.

Given the set of ordered pairs {(1,1), (2,4), (3,9)}, which of the following function rules correctly describes the relationship between x and y?

• y = x + 1

• y = 2x + 1

Which of the following sets of ordered pairs represents a function?

• {(1, 2), (2, 3), (3, 4)}

• {(2, 3), (2, 4), (3, 5)}

• {(4, 5), (4, 6), (5, 7)}

• {(0, 1), (0, 2), (1, 3)}

Which of the following is the correct domain  of  the given function rule y = 2x + 1.

• Domain: {x| x ∈ R}

• Domain: {x| x ≥ 0}

• Domain: {x| x ≠ 1}

• Domain: {x| x ≠ 2}

• Domain: {x| x ∈ R}

• Domain: {x| x ≠ 4}

• Domain: {x| x ≠ 2}

• Domain: {x| x ≠ -4}