AnswersWI-Mathematics Grade 8 AUsing Function Notation

Using Function Notation Answers

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The table shows data collected to represent the functional relationship between the number of people attending a wedding and the cost of the wedding. 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
all integers greater than or equal to zero
D
{5, 10, 15, 20, 25}
2
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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}
3

Which word best describes the domain of a function?

A
input
B
output
C
dependent
D
relation
4

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}
5

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
6

Reza paid $4,500 as a down payment on a car. She then made equal monthly payments of $250. Reza paid a total of $10,500 for her car. How many months did she make payments on the car and which function can be used to find the answer?

A
; 24 months
Option A
B
; 3 months
Option B
C
; 3 months
Option C
D
; 24 months
Option D
7

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
8

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
9

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
10

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

Question illustration
A
all real numbers
B
Negative 4 less-than-or-equal-to x less-than-or-equal-to 4
Option B
C
Negative 3 less-than-or-equal-to y less-than-or-equal-to negative 1
Option C
D
y less-than 0
Option D

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