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:

1. Consider the graph of h(t) shown. The function represents the height, h, in feet, of a ball t seconds after being launched.

What is the point, if any, at which the concavity changes from concave down to concave up?

A) At t=0.705
B) The graph is always concave down.
C) The graph is always concave up.
D) At t=1.41

2. The function d(x)=14+65xrepresents the distance, in meters, from a tower to an object at time x, in seconds.
What is the value of d(1.5)?

A) 111.5
B) 86
C) 65
D) 0.19

3. The populations, in thousands, of two towns are shown in the graph, where the horizontal axis measures the time in years.

Which town's population is growing at a faster rate?

A) Town A, because 1.6 > 0.9
B) Town B, because 1.6 > 0.9
C) Town A, because 8.0 > 6.5
D) Town B, because 8.0 > 6.5

4. The number of comments on a social media post is represented by the logistic function f(x), whose graph is shown, where xrepresents the number of days since the post was created and f(x)represents the number of comments on day x.

How does the number of comments change as time progresses from day 1 to day 17?

A) The number of comments decreases faster and faster.
B) The number of comments increases faster and faster.
C) The number of comments decreases slower and slower.
D) The number of comments increases slower and slower.

5. 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.

Solutions: