AnswersWI-Mathematics Grade 8 AUsing Function Notation

Using Function Notation Answers

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What is the range of the function represented by the table?

Question illustration
A
{2, 4, 6, 8, 10}
B
{2.5, 5.0, 7.5, 10.0, 12.5}
C
{2, 2.5, 4, 5.0, 6, 7.5, 8, 10, 12.5}
D
{0.0, 0.5}
2
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A function is defined by . What is f(–8)?

Question illustration
A
–2
B
Negative one-half
Option B
C
One-half
Option C
D
2
3

Which word best describes the range of a function?

A
input
B
output
C
independent
D
relation
4

The table represents the function . Which value goes in the empty cell?

Question illustration
A
–51
B
–5
C
5
D
51
5

What is the range of the function represented by these ordered pairs? {(–2, 1), (0, 0), (3, –1), (–1, 7), (5, 7)}

A
{–2, –1, 0, 3, 5}
B
{–1, 0, 1, 7}
C
{–2, –1, 0, 1, 3, 5, 7}
D
{0, 1, 7}
6

Which choice shows a function with a domain of {–4, –2, 2, 4}?

A
On a coordinate plane, a vertical line is at x = 2.
Option A
B
On a coordinate plane, a line goes through (negative 2, negative 2) and (0, negative 3).
Option B
C
{(–4, 2), ( –2, 1), (2, 0), (4, 5)}
D
{(1, –4), (0, –2), (2, 2), (6, 4)}
7

What is the range of the function represented by the graph?

Question illustration
A
{0, 1, 2, 3}
B
{1, 2, 3, 4}
C
1 less-than-or-equal-to y less-than-or-equal-to 4
Option C
D
0 less-than-or-equal-to x less-than-or-equal-to 3
Option D
8

Which is the function represented by the table?

Question illustration
A
f (x) = x + 5
Option A
B
f (x) = x minus 5
Option B
C
f (x) = x + 1
Option C
D
f (x) = x minus 1
Option D
9

Jay went to an amusement park. The park charges an entrance fee of $10.50 and $4.50 for every ride. Jay spent $46.50 on entrance fees and rides. Which fuction can be used to find the number of rides he went on?

A
f (x) = 4.5 x + 10.5
Option A
B
f (x) = 4.5 x
Option B
C
f (x) = 4.5 x minus 10.5
Option C
D
f (x) = negative 4.5 x
Option D
10

The table represents the function . Which value goes in the empty cell?

Question illustration
A
3
B
5
C
8
D
23
11

Which is the function represented by the table?

Question illustration
A
f (x) = negative 2 x + 1
Option A
B
f (x) = x minus 2
Option B
C
f (x) = x + 4
Option C
D
f (x) = 3 x
Option D
12

A function is a relation in which each element in the input is mapped to how many elements in the output?

A
exactly one
B
one or more
C
one or two
D
exactly two
13

The table shows data collected to represent the functional relationship between the number of hours an auto factory is open and the number of cars produced.What is the domain of the function represented by the table?

Question illustration
A
all real numbers
B
x greater-than-or-equal-to 0
Option B
C
{3, 5, 7, 9, 11}
D
{75, 125, 175, 225, 275}

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