# Lesson Worksheet: Identifying Functions Mathematics

In this worksheet, we will practice identifying a function from a relation shown by a set of ordered pairs, a relation diagram, an equation, or a graph.

Q1:

What is a function?

• AA dependent quantity
• BA combination of domain and range
• CA relation that relates each input to exactly one output
• DAn independent quantity

Q2:

True or False: The following set of ordered pairs represents a function: .

• ATrue
• BFalse

Q3:

Which of these sets of ordered pairs does not represent a function?

• Ab and d
• Bc
• Cb and c
• Da and d
• Eb

Q4:

Which of the following relations represents a function? • A(c)
• B(b)
• C(a) and (c)
• D(a)
• Eall

Q5:

Which of the following relations represents a function?

 Relation A Relation B (4,12) (4,15) (5,18) (5,21) (6,24) (4,12) (5,15) (6,18) (7,21) (8,24)
• ARelation A
• BRelation B

Q6:

If a graph represents a function, how many points of intersection does it have with a vertical line?

• AAt most one.
• BTwo or more points.

Q7:

Does the given graph represent a function? • ANo
• BYes

Q8:

Which of the following relations represents a function given that is the input and is the output?  • A(a)
• B(b)

Q9:

Which of the following is the equation expressed in function notation?

• A
• B
• C
• DThis cannot be expressed as a function.
• E

Q10:

Can the equation be expressed as a function? If yes, state the function.

• AYes,
• BYes,
• CYes,
• DNo
• EYes,

This lesson includes 24 additional questions and 117 additional question variations for subscribers.

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