WGU Applied Algebra FXO2 PFXP C957 - Applied-Algebra Exam Practice Test

Question 1

The number of daily raffle tickets sold, R(d), for a fundraiser is represented by the graph, with the number of days since the beginning of the month along the horizontal axis and the number of raffle tickets sold for the day along the vertical axis.

How can the concavity be described from d=0to d=4.4?

A. The number of raffle tickets decreases slower and slower and then increases faster and faster.

B. The number of raffle tickets decreases faster and faster and then decreases slower and slower.

C. The number of raffle tickets decreases slower and slower and then decreases faster and faster.

D. The number of raffle tickets increases slower and slower and then decreases faster and faster.

Correct Answer: A

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Question 2

The data in the scatterplot represents the number of people working at a research station over time. The graphed regression function has an r
2
value of 0.96. The predicted number of people working at the research station after 18.1 years is 541.

Is this prediction appropriate?

A. Yes. The r2value indicates a moderate fit, and x=18.1 is within 25% of the range of the maximum value.

B. No. The r2value indicates a strong fit, but x=18.1 is more than 50% of the range beyond the maximum value.

C. No. The r2value indicates a moderate fit, but x=18.1 is more than 25% of the range beyond the maximum value.

D. Yes. The r2value indicates a strong fit, and x=18.1 is within 50% of the range of the maximum value.

Correct Answer: B

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Question 3

A small business is tracking the number of client accounts it manages over time. The graph shows the relationship between time and the number of client accounts the small business manages.

What is the equation of the horizontal asymptote?

A. y=125

B. x=125

C. x=550

D. y=550

Correct Answer: A

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Question 4

A researcher collected data on the number of members in a national association over time. The results are shown in the scatterplot. The graphed regression function has an r^2value of 0.54.

Is it appropriate to make a prediction for the number of members after 20.6years?

A. Yes. The r^2value indicates a strong fit, and x=20.6is within 50%of the range of the maximum value.

B. No. The r^2value indicates a strong fit, but x=20.6is more than 50%of the range beyond the maximum value.

C. Yes. The r^2value indicates a moderate fit, and x=20.6is within 25%of the range of the maximum value.

D. No. The r^2value indicates a moderate fit, but x=20.6is more than 25%of the range beyond the maximum value.

Correct Answer: C

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Question 5

The data in the scatterplot represents the number of monthly train crossings at a particular intersection over time.

Which type of function should be used to model the data?

A. Linear

B. Exponential

C. Polynomial

D. Logistic

Correct Answer: B

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Question 6

Consider the graph of x(t) shown. The function represents the number of users, x, watching a live video t hours after 9:00 a.m.

Which interval represents a range of values for which the number of users is decreasing slower and slower?

A. t=11.6 to t=11.8

B. t=0.3 to t=0.8

C. t=4.9 to t=9.2

D. t=6.8 to t=7.4

Correct Answer: D

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WGU Applied Algebra FXO2 PFXP C957 - Applied-Algebra Exam Practice Test

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