Free WGU Applied-Algebra Exam Questions

A researcher collected data on the average selling price for tickets to a concert over time. The results areshown in the scatterplot. A regression function is graphed with r2=0.56. The predicted average selling price for tickets after 10.8 days is $167.20.Is this prediction appropriate?

The scatterplot shows data on the usage of a computer ' s CPU over time. The graphed regression function has an value of .What is the appropriate range of -values for extrapolation?

In the graph showing the number of daily homework problems assigned for a math class, the horizontal axis shows the number of school days since the beginning of the term and the vertical axis shows the number of daily homework problems.Which conclusion is correct based on this graph? 

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

The scatterplot shows data on the usage of a computer ' s CPU over time. The graphed regression function has an value of .What is the appropriate range of -values for extrapolation?