WGU Applied-Algebra valid study dumps : 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. The scatterplot shows data on the number of shirts sold at a gift shop per week over time. The graphed regression function has an r
2
value of 0.09.

Which range of x-values is appropriate for extrapolation?

A) x=0 to x=18
B) x=#3 to x=21
C) Extrapolation is not appropriate because r
2
< 0.7.
D) Extrapolation is not appropriate because r
2
< 0.3.

2. 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 B, because 6.5 > 5.5
B) Town B, because 1.3 > 1.1
C) Town A, because 6.5 > 5.5
D) Town A, because 1.3 > 1.1

3. A researcher collected data on the number of large donations per year to a charitable organization. The results are shown in the scatterplot. A regression function is graphed with r^2.

What is the appropriate range of x-values for extrapolation?

A) x=0to x=18
B) Extrapolation is not appropriate because r^2 < 1.
C) Extrapolation is not appropriate because r^2 < 0.7.
D) x=-3to x=21

4. The values, in dollars, of two accounts over time are modeled by
A_1 (t)=6,500× # 1.05 # ^t
and
A_2 (t)=3,000× # 0.96 # ^t
The variable tis measured in years.
What is the difference between the accounts after 3 years?

A) The value of Account 1 is about $4,870less than the value of Account 2.
B) The value of Account 1 is about $4,870greater than the value of Account 2.
C) The value of Account 1 is about $2,654less than the value of Account 2.
D) The value of Account 1 is about $2,654greater than the value of Account 2.

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) Polynomial
B) Logistic
C) Linear
D) Exponential

Solutions: