AnswersGA-8th Grade MathematicsUnit Test

Unit Test — Unit test Answers

25 verified answers2 views
1
Free Preview

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
2
Free Preview

A plumber charges a $45 fee to make a house call and then $25 for each hour of labor. The plumber uses an equation in the form to determine the amount to charge each customer. What is the value of m in the equation?m = $

Question illustration
Answer not available
3

Look at the graph of the linear function. The rate of change between point A and point B is 2. What is the rate of change between point C and point D?

Question illustration
A
–2
B
Negative one-half
Option B
C
One-half
Option C
D
2
4

Maria wrote the equation of a line that has a slope of and passes through point (3, 5). Which statement is true?

Question illustration
A
The y-intercept is 4.
B
The slope-intercept equation is .
Option B
C
The point-slope equation is .
Option C
D
The line also passes through the point (0, –2).
5

The point-slope form of a line that has a slope of –2 and passes through point (5, –2) is shown below.What is the equation in slope-intercept form?

Question illustration
A
y = negative 2 x + 12
Option A
B
y = negative 2 x + 8
Option B
C
y = negative 2 x minus 7
Option C
D
y = negative 2 x minus 3
Option D
6

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.
7

Which equation represents a line that has a slope of and passes through point (–2, 1)?

Question illustration
A
y = one-third x minus 1
Option A
B
y = one-third x + five-thirds
Option B
C
y = one-third x minus five-thirds
Option C
D
y = one-third x + 1
Option D
8

The value of a collectible coin can be represented by the equation , where x represents its age in years and y represents its total value in dollars. What is the value of the coin after 19 years?

Question illustration
A
$2
B
$23
C
$38
D
$53
9

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

Question illustration
A
3
B
5
C
8
D
23
10

The chart below lists the original and sale prices of items at a clothing store.Clothing PricesOriginal priceSale price$7.99$5.59$10.99$7.69$12.99$9.09$15.99$11.19$24.99$17.49$29.99$20.99Which statement best describes why the sale price is a function of the original price?

A
As the original price increases, the sale price also increases.
B
The sale price is always less than the original price.
C
For every original price, there is exactly one sale price.
D
The sales price is never less than zero.
11

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
12

Jamal drew the function below. Which explains whether or not his function is linear?

Question illustration
A
It is linear because it has a constant rate of change.
B
It is linear because it does not have a constant rate of change.
C
It is not linear because it has a constant rate of change.
D
It is not linear because it does not have a constant rate of change.
13

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
14

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}
15

What are the slope and the y-intercept of the linear function that is represented by the equation ?

Question illustration
A
The slope is –10, and the y-intercept is –1.
B
The slope is –10, and the y-intercept is 1.
C
The slope is –1, and the y-intercept is –10.
D
The slope is 1, and the y-intercept is –10.
16

A line passes through the point (4, –2) and has a slope of . What is the value of a if the point (–4, a) is also on the line?

Question illustration
A
–6
B
–5
C
5
D
6
17

In the table below, x represents the miles traveled and y represents the cost to travel by train. Miles, xCost, y28.50515.25822.001231.00What is the slope of this function?

A
0.44
B
0.63
C
2.25
D
22.50
18

Is the function represented by the table non-linear?xy6472809–2

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.
19

Carol is cross-country skiing. The table shows the distance she traveled after various numbers of minutes. What is the rate of change?Distance Carol Traveled while Cross-Country SkiingMinutesDistance Traveled (miles)23456

Question illustration
A
StartFraction 1 Over 12 EndFraction
Option A
B
StartFraction 1 Over 6 Endfraction
Option B
C
StartFraction 3 Over 32 EndFraction
Option C
D
StartFraction 3 Over 16 EndFraction
Option D
20

A line passes through the points (8, –1) and (–4, 2). What is the y-intercept of this line?

Question illustration
A
–4
B
–1
C
1
D
4

Did you find these answers helpful?

More from this Course

Quiz
25 verified answers

Unit Test

Quiz
25 verified answers

Unit Test

Quiz
10 verified answers

Quiz