AnswersAZ-College Prep Math BUnit Test

Unit Test — Cumulative exam Answers

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Lydia collected two sets of data.Set 1Set 217811380189451782195One set of data shows an outlier. Which set has an outlier, and which number is the outlier?

A
Set 1 contains an outlier. The outlier is 51.
B
Set 1 contains an outlier. The outlier is 13.
C
Set 2 contains an outlier. The outlier is 78.
D
Set 2 contains an outlier. The outlier is 95.
22
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Which function has a domain of and a range of ?

Question illustration
A
y = StartRoot x minus 5 EndRoot + 3
Option A
B
y = StartRoot x + 5 EndRoot minus 3
Option B
C
y = negative StartRoot x minus 5 EndRoot + 3
Option C
D
y = negative StartRoot x + 5 EndRoot minus 3
Option D
23

Which function represents exponential decay?

Question illustration
f
f(x) =
Option f
f
f(x) =
Option f
f
f(x) = 4
Option f
f
f(x) = 4
Option f
24

For which scatterplot is the correlation strongest?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
25

The scatterplot shows the number of minutes spent reading (x) and the number of pages read (y) by each of seven students last night. Use the labeled points to create a linear model that predicts the number of pages that a typical student reads in x minutes. Which equation represents this linear model?

Question illustration
A
mc009-2.jpg
Option A
B
mc009-3.jpg
Option B
C
mc009-4.jpg
Option C
D
mc009-5.jpg
Option D
26

Which is considered a good credit practice?

A
Use the credit card with the highest interest rate.
B
Make late payments.
C
Pay more than the minimum amount that is due.
D
Borrow more than one can afford to repay.
27

Jacob has golf scores of 120, 112, 130, 128, and 124. He wants to have a mean, or average, golf score of 118. What score does he need in his next golf game to achieve this mean score?

Answer not available
28

Use the data on the dot plot to answer the question. How many people read for more than three hours last week?

Question illustration
Answer not available
29

Solve for in the equation .

Question illustration
A
x = negative 11 plus-or-minus StartFraction 25 Over 2 EndFraction
Option A
B
x = negative eleven-halves plus-or-minus StartFraction 25 Over 2 EndFraction
Option B
C
x = negative 11 plus-or-minus StartFraction 5 StartRoot 5 EndRoot Over 2 EndFraction
Option C
D
x = negative eleven-halves plus-or-minus StartFraction 5 StartRoot 5 EndRoot Over 2 EndFraction
Option D
30

Which is the graph of f(x) = 2(3)x?

A
Option
B
Option
C
Option
D
Option
31

Over which interval does the exponential show a more rapid rate of change?

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
32

Viktoria knows that it is impossible to remove a red marble from her bag that has no red marbles in it. If she reaches into the bag and pulls out a marble without looking, what is the probability that the marble will be red?

A
0
B
StartFraction 1 over 11 EndFraction
Option B
C
Three-fourths
Option C
D
1
33

Which function represents exponential growth?

A
f(x) = 3x
B
f(x) = x3
C
f(x) = x + 3
D
f(x) = 3x
34

The table below shows how the number of hours needed to fill a pool depends on the flow rate of the hoses used to fill it.Flow rate, x(gal/hr)Time, y(hours)60300454003650030600How long will it take to fill the pool if two hoses are used, one that fills at a rate of 40 gallons per hour and one that fills at a rate of 60 gallons per hour?

A
100 hours
B
150 hours
C
180 hours
D
200 hours
35

For which value of m does the graph of y = 18x2 + mx + 2 have exactly one x-intercept?

A
0
B
9
C
12
D
16
36

Using the quadratic formula to solve 11x2 – 4x = 1, what are the values of x?

A
StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction StartRoot 15 EndRoot Over 11 EndFraction
Option A
B
StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction 2 StartRoot 15 EndRoot Over 11 EndFraction
Option B
C
StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction StartRoot 7 EndRoot Over 11 EndFraction
Option C
D
StartFraction 2 Over 11 EndFraction plus-or-minus StartFraction StartRoot 7 EndRoot i Over 11 EndFraction
Option D
37

Mrs. Barnes recorded the grades her students earned on the last chapter test in the frequency table below.The frequency table will be used to make a histogram. Test ScoreNumber of Students31 - 40141 - 50251 - 60461 - 70671 - 801181 - 90591 - 1004Which chart has the correct setup for Mrs. Barnes’ histogram?

A
A 2-column table with 4 rows titled Mrs. Barnes's Histogram. Column 1 has entries interval used, appropriate scale, vertical axis represents, horizontal axis represents. Column 2 has entries 10, 31 to 100, number of students, test scores.
Option A
B
A 2-column table with 4 rows titled Mrs. Barnes's Histogram. Column 1 has entries interval used, appropriate scale, vertical axis represents, horizontal axis represents. Column 2 has entries 10, 0 to 12, number of students, test scores.
Option B
C
A 2-column table with 4 rows titled Mrs. Barnes's Histogram. Column 1 has entries interval used, appropriate scale, vertical axis represents, horizontal axis represents. Column 2 has entries 7, 0 to 12, test scores, number of students.
Option C
D
A 2-column table with 4 rows titled Mrs. Barnes's Histogram. Column 1 has entries interval used, appropriate scale, vertical axis represents, horizontal axis represents. Column 2 has entries 7, 31 to 100, test scores, number of students.
Option D
38

Ten people reported the number of hours they worked last week.17, 42, 40, 35, 24, 20, 30, 32, 25, 38What is the median, lower quartile, upper quartile, and interquartile range of this set of data?

A
median: 31lower quartile: 24upper quartile: 38interquartile range: 14
B
median: 22lower quartile: 40upper quartile: 32interquartile range: 8
C
median: 31lower quartile: 24upper quartile: 38interquartile range: 7
D
median: 32lower quartile: 24upper quartile: 38interquartile range: 14
39

Since they filed bankruptcy in the past, a couple ends up paying a 12% fixed rate for a 30 year mortgage. With a better credit rating, they could have gotten the loan at a rate of 8%. If their loan amount is $140,000, how much more per month will the couple be paying for their mortgage as a result of their bankruptcy?

A
$137,532.67
B
$412.79
C
$1,440.06
D
$260.37
40

Which measure of center is shown in a box plot?

A
mean
B
median
C
mode
D
range

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