AnswersFL-1205070-MJ Grade 8 Pre-AlgebraUnit Test

Unit Test Answers

15 verified answers
1
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Which graph represents a linear function?

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A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
2
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Sung-Hi is filling a sandbox with sand at the rate shown in the table below. Which statement must be true regarding the linear function that represents this situation?Amount of Sand in the SandboxNumber of Minutes Since Sung-Hi Started01234Amount of Sand in the Sandbox (pounds)200220240260280

T
The initial value must be 0 pounds.
T
The initial value must be 20 pounds.
T
The rate of change must be 0 pounds per minute.
T
The rate of change must be 20 pounds per minute.
3

Maricella plots two ordered pairs on the grid below. The line segment is extended to cross both axes. What is the location of the y-intercept on the line?

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(
(0, –22)
(
(0, –10)
(
(0, –5)
(
(0, 5)
4

best

I
It is a function because there is a price given for every package.
I
It is a function because weekend packages are always $50 more than weekday packages.
I
It is not a function because each package number has two different prices.
I
It is not a function because there are two different packages available for $180.
5

Which equation represents a direct variation?

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A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
6

A teacher presented students with four tables. Table 1Table 2Table 3Table 4Which table describes a linear function that has a slope of 2?

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T
Table 1
T
Table 2
T
Table 3
T
Table 4
7

The table of values below represents a linear function and shows the height of a tree since it was transplanted. What was the height of the tree when it was transplanted?Height of a Tree Since It Was TransplantedYears Since the Tree Was Transplanted44.555.56Height (feet)1213141516

1
1 foot
2
2 feet
4
4 feet
8
8 feet
8

Both Andrew and Karleigh recorded the distance they ran in x minutes on treadmills.AndrewKarleighAndrew and Karleigh each run for 1 hour. Which statement explains who ran a greater distance?

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A
Andrew ran a greater distance. The slope of the line described by the data in his table increased at a rate of mile per minute compared to Karleigh’s mile per minute.
Option A
K
Karleigh ran a greater distance. The slope of the line described by the data in her table increased at a rate of mile per minute compared to Andrew’s mile per minute.
Option K
K
Karleigh ran a greater distance. The slope of the line described by the data in her table increased at a rate of mile per minute compared to Andrew’s mile per minute.
Option K
A
Andrew ran a greater distance. The slope of the line described by the data in his table increased at a rate of mile per minute compared to Karleigh’s mile per minute.
Option A
9

This function models the relationship between the hours worked, x, and the amount of money earned, f(x). Which choices could be elements of the domain of the function? Check all that apply.

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5
5
2
200
2
25.5
D
Option
Option D
7
77
Option 7
–
–10
–
–43.5
–
–113
Option –
10

Is the function in the graph non-linear?

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Y
Yes, because it has a constant rate of change.
Y
Yes, because it does not have a constant rate of change.
N
No, because it has a constant rate of change.
N
No, because it does not have a constant rate of change.
11

Based on the graph of the line below, which describes the relationship between the value of the y-intercept and the value of the slope?

Question illustration
T
The y-intercept is 3, and the slope is .
Option T
T
The y-intercept is , and the slope is 3.
Option T
T
The y-intercept is 3, and the slope is 3.
T
The y-intercept is , and the slope is .
Option T
12

Which figure correctly demonstrates using a straight line to determine that the graphed equation is not a function of x?

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A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
13

How does the graph change between point A and point C?

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T
The graph increases, then decreases.
T
The graph decreases, then remains constant.
T
The graph decreases, then increases.
T
The graph increases, then remains constant.
14

How does the graph below change between point A and point B?

Question illustration
T
The graph increases.
T
The graph decreases.
T
The graph decreases, then increases.
T
The graph increases, then decreases.
15

The table below represents the amount of money in Sylvester’s bank account as a function of the number of years since he opened the account. Does this situation represent a linear or non-linear function, and why?Amount of Money in Sylvester’s Bank AccountYearsAmount of Money (dollars)150021,00041,50082,000162,500

I
It represents a linear function because there is a constant rate of change.
I
It represents a linear function because there is not a constant rate of change.
I
It represents a non-linear function because there is a constant rate of change.
I
It represents a non-linear function because there is not a constant rate of change.

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