WGU Applied-Algebra Exam Questions : WGU Applied Algebra FXO2 PFXP C957

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WGU Applied-Algebra Exam Syllabus Topics:

WGU Applied Algebra FXO2 PFXP C957 Sample Questions:

Question 1

The spread of two viruses within a single population is modeled using the functions in the graph.

What is a correct conclusion based on the graph?

A. Virus A affects 80%of the population before virus B does.
B. Virus A affects 20%of the population before virus B does.
C. Virus A affects 70%of the population before virus B does.
D. Virus A affects 80%of the population before virus B does.

Question 2

The function f(z) represents the relationship between the number of units in two inventories, where z is the number of units in inventory A and f(z) is the number of units in inventory B. The number of units in inventory B is 2 more than the number of units in inventory A. Which function represents this situation?

A. f(z)=z+2
B. f(z)=z#2
C. f(z)=z/2
D. f(z)=2z

Question 3

The growth of an animal population is shown in the graph. The instantaneous rate of change at point Pis 3.74.

Which interpretation of the instantaneous rate of change is correct?

A. In 2012, the population was increasing by 3,740 animals per year.
B. In 2007, the population was increasing by 3.74 animals per year.
C. In 2012, the population was increasing by 3.74 animals per year.
D. In 2007, the population was increasing by 3,740 animals per year.

Question 4

A researcher collected data on the traffic frequency on a section of road. The results are shown in the scatterplot. A regression function is graphed with r^2=0.96. The predicted traffic frequency 16.2 hours after dawn is 70 cars per minute.

Is this prediction appropriate?

A. Yes. The r^2value indicates a strong fit, and x=16.2is within 50%of the range of the maximum value.
B. Yes. The r^2value indicates a moderate fit, and x=16.2is within 25%of the range of the maximum value.
C. No. The r^2value indicates a strong fit, but x=16.2is more than 50%of the range beyond the maximum value.
D. No. The r^2value indicates a moderate fit, but x=16.2is more than 25%of the range beyond the maximum value.

Question 5

The graphed function n(t)represents the number of people, n, at a park thours after 8:00 a.m. The plotted points Aand Bhave coordinates (2#110)and (6#182).

Which statement gives the correct interpretation of the average rate of change of the number of people over the interval from point Ato point B?

A. The number of people at the park increases at an average rate of 9 per hour.
B. The number of people at the park decreases at an average rate of 9 per hour.
C. The number of people at the park decreases at an average rate of 18 per hour.
D. The number of people at the park increases at an average rate of 18 per hour.

Solutions: