AnswersWCPSS-Introductory Math CRUnit Test

Unit Test — Unit test Answers

25 verified answers
1
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The table shows the side lengths and perimeters of four squares.Side Length (x)Perimeter (y)4.5188.53410.254113.7555Which equation represents the relationship between the side length, x, and the perimeter, y?

A
y = one-fourth x
Option A
B
y = 4x
C
y = x + 13.5
D
y = x – 13.5
2
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When Jules loses a golf ball he takes another from the box. Which graph models this relationship?

A
A graph has golf balls lost on the x-axis and gold balls in box on the y-axis. A line with positive slope is on the graph.
Option A
B
A graph has golf balls lost on the x-axis and gold balls in box on the y-axis. A line with negative slope is on the graph.
Option B
C
A graph has golf balls lost on the x-axis and gold balls in box on the y-axis. Points form a line with positive slope.
Option C
D
A graph has golf balls lost on the x-axis and gold balls in box on the y-axis. Points form a line with negative slope.
Option D
3

The table below shows the relationship between the approximate number of hours and the corresponding number of days on Saturn.SaturnHoursDays25354055What is the approximate number of hours in 72 days on Saturn?

Question illustration
A
603 and two-thirds
Option A
B
658 and two-thirds
Option B
C
743
D
768
4

How does the graph change from point G to point K?

Question illustration
A
The graph increases.
B
The graph decreases, then increases.
C
The graph remains constant.
D
The graph increases, then decreases.
5

A graph in visual form that expresses the important characteristics of a situation and does not necessarily have numerical values is

A
a qualitative graph.
B
a discrete graph.
C
a continuous graph.
D
a cosmograph.
6

What is the rate of change of the function?

Question illustration
A
–2
B
Negative one-half
Option B
C
One-half
Option C
D
2
7

Which table of values corresponds to the graph below?

Question illustration
A
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 3, 0, 3, 6. Column 2 is labeled y with entries negative 1, 0, 1, 2.
Option A
B
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 1, 0, 1, 2. Column 2 is labeled y with entries negative 3, 0, 3, 6.
Option B
C
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 1, 0, 1, 6. Column 2 is labeled y with entries negative 1, 0, 1, 2.
Option C
D
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 1, 0, 1, 2. Column 2 is labeled y with entries negative 1, 0, 1, 6.
Option D
8

The graph below represents the amount of change Jaxon would receive, y, if he bought a item with a cost of x. Jaxon’s ChangeWhich equation represents the graph?

Question illustration
A
y = 10 – x
B
y = x – 10
C
y = –x – 10
D
y = 10 + x
9

The temperature in degrees Celsius, c, can be converted to degrees Fahrenheit, f, using the equation . Which statement best describes if the relation (c, f) is a function?

Question illustration
A
It is a function because –40°C is paired with –40°F.
B
It is a function because every Celsius temperature is associated with only one Fahrenheit temperature.
C
It is not a function because 0°C is not paired with 0°F.
D
It is not a function because some Celsius temperatures cannot be associated with a Fahrenheit temperature.
10

The number of people who participate in the community band over four months is shown in the graph.Community Band ParticipationWhich statement is supported by the graph?

Question illustration
A
The band had the same number of participants in September and in November.
B
The band had the same number of participants in October and in December.
C
The number of participants in the band decreased from October to November.
D
The number of participants in the band decreased from November to December.
11

Which of these tables represents a linear function?

A
A 2-column table with 4 rows. Column 1 is labeled x with entries 3, 4, 5, 6. Column 2 is labeled y with entries 3, 4, 6, 7.
Option A
B
A 2-column table with 4 rows. Column 1 is labeled x with entries 3, 4, 5, 6. Column 2 is labeled y with entries 6, 5, 4, 3.
Option B
C
A 2-column table with 4 rows. Column 1 is labeled x with entries 3, 4, 5, 6. Column 2 is labeled y with entries 7, 6, 5, 3.
Option C
D
A 2-column table with 4 rows. Column 1 is labeled x with entries 3, 4, 5, 6. Column 2 is labeled y with entries 2, 4, 5, 6.
Option D
12

Which equation is a function of x?

A
x = 5
B
x = y squared + 9
Option B
C
x squared = y
Option C
D
x squared = y squared + 16
Option D
13

Which situation is modeled by the graph?

Question illustration
A
the height of a jump rope being used over time
B
the height of an elevator over time
C
the height of a commuter airplane over time
D
the height of a hummingbird at a feeder
14

Kelly and Greta are asked to write an equation for the scenario below. “One person was able to plant 4 trees in the same amount of time that 5 people working together were able to plant 20 trees.”The girls agree that x represents the number of people working and y represents the number of trees planted. Kelly wrote the equation , and Greta wrote the equation . Which person is correct, and why?

Question illustration
A
Kelly is correct; each person plants more trees than the person before them.
Option A
B
Kelly is correct; and .
Option B
C
Greta is correct; each person plants 4 more trees than the person before them.
D
Greta is correct; and .
Option D
15

Miguel used the graph below to convert temperatures in degrees Fahrenheit (F) to Celsius (C).The graph shows that as F increases, C ________.

Question illustration
A
decreases
B
increases
C
is constant
D
increases then decreases
16

Is the function represented by the table linear?xy10–61111261312

A
Yes, because it has a constant rate of change.
B
Yes, because it does not have a constant rate of change.
C
No, because it has a constant rate of change.
D
No, because it does not have a constant rate of change.
17

Which pair of points have equal x-coordinates?

Question illustration
A
points Q and R
B
points Q and T
C
points R and S
D
points S and T
18

William is in the middle of swimming in a ten-mile race. He swims at a steady speed, and then slows down, stops to eat, swims faster to get back in the race, and returns to a steady speed. He slows down again, stops for water, and then again swims faster to get back in the race. Which graph best represents the situation?

A
A graph with time on the x-axis and speed on the y-axis. The graph is constant, decreases to 0, increases, is constant, decreases to 0, and then increases.
Option A
B
A graph with time on the x-axis and speed on the y-axis. The graph decreases, is constant at 0, increases, is constant, decreases to 0, and then increases.
Option B
C
A graph with time on the x-axis and speed on the y-axis. The graph is constant, decreases to 0, is constant, increases, decreases to 0, and then increases.
Option C
D
A graph with time on the x-axis and speed on the y-axis. The graph is constant, decreases to 0, is constant, increases, and then is constant.
Option D
19

Which statement is a correct interpretation of the vertical line test?

A
If only one vertical line intersects the graph at exactly one point, the graph represents a function.
B
If only one vertical line intersects the graph at exactly one point, the graph does not represent a function.
C
If any vertical line can intersect the graph at more than one point, the graph represents a function.
D
If any vertical line can intersect the graph at more than one point, the graph does not represent a function.
20

Look at the graph. Cost of Toy CarsWhat is the cost of 18 toy cars?

Question illustration
A
$12
B
$20
C
$22
D
$27

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