WGU C957 PREPARATION EXAM QUESTIONS
WITH ANSWERS GRADED
◍ Logistic function notation.
Answer: T(x)= 1000/1+4e^-0.2x
◍ concavity.
Answer: measures how quickly the instantaneous rate of change of a
function is changing
◍ X axis lists:.
Answer: Independent variable/ input
◍ The graph of the function C below represents the number of coal miners in
the United States from 1985 to 2015.C(y) represents the number of coal
miners in the United States in the year y. For example, C(1985) shows there
were 170,000 coal miners in the United States in 1985.Which interpretation
of the function C is accurate?.
Answer: C(2000) represents 70,000 coal miners in 2000.
◍ Interpolation of strong model correlation.
Answer: Within data points
◍ A high-interest loan company uses the function L(d) = 100e0.02d to
calculate late fees, L, for payments overdue by d days. What does L(67)
represent?.
Answer: L(67) is the amount due in late fees for a payment that is 67 days
overdue, which would be $381.90.
◍ Exponential function notation.
Answer: E(x)=2e^-0.7x
◍ A function doubles each input. What does the inverse function do? A.
Doubles each input B. Adds 2 to each input C. Subtracts 2 from each input
, D. Halves each input.
Answer: D
◍ The unemployment rate in Poland for the time period from 1990 to 2012 is
shown in the graph below using the function U(t) (measured as a
percentage), where t is the year. For example, U(1990) is the unemployment
rate for the year 1990.What can be concluded based on this graph?.
Answer: The largest two-year increase in unemployment was from 1990 to
1992.
◍ Given the function C(p)=20-p, which of these would be a coordinate on the
graph? A. (5, 16)B. (5, 18)C. (5, 17)D. (5, 15).
Answer: D
◍ The profit function P(x) gives a company's total profit (in millions of U.S.
dollars) for x products produced (in thousands). The graph of P(x) is
below:At which number of products produced does the company stop being
profitable?.
Answer: About 4,500 items
◍ inequality.
Answer: A mathematical sentence that shows the relationship between
quantities that are not equivalent
◍ Global Maximum.
Answer: Finds the highest y-number the function goes to
◍ A bank begins a marketing campaign to increase its number of customers.
Each month, all new customers are put into a drawing. One customer then
receives a $50 credit in a checking account.The amount of money given
away in the drawing, G, is a function of the number of months, M, the
drawing has been going on for. What is the correct function notation to
represent the amount of money given away after the drawing has been going
on for 5 months?.
Answer: G(5) = 250
◍ response variable.
WITH ANSWERS GRADED
◍ Logistic function notation.
Answer: T(x)= 1000/1+4e^-0.2x
◍ concavity.
Answer: measures how quickly the instantaneous rate of change of a
function is changing
◍ X axis lists:.
Answer: Independent variable/ input
◍ The graph of the function C below represents the number of coal miners in
the United States from 1985 to 2015.C(y) represents the number of coal
miners in the United States in the year y. For example, C(1985) shows there
were 170,000 coal miners in the United States in 1985.Which interpretation
of the function C is accurate?.
Answer: C(2000) represents 70,000 coal miners in 2000.
◍ Interpolation of strong model correlation.
Answer: Within data points
◍ A high-interest loan company uses the function L(d) = 100e0.02d to
calculate late fees, L, for payments overdue by d days. What does L(67)
represent?.
Answer: L(67) is the amount due in late fees for a payment that is 67 days
overdue, which would be $381.90.
◍ Exponential function notation.
Answer: E(x)=2e^-0.7x
◍ A function doubles each input. What does the inverse function do? A.
Doubles each input B. Adds 2 to each input C. Subtracts 2 from each input
, D. Halves each input.
Answer: D
◍ The unemployment rate in Poland for the time period from 1990 to 2012 is
shown in the graph below using the function U(t) (measured as a
percentage), where t is the year. For example, U(1990) is the unemployment
rate for the year 1990.What can be concluded based on this graph?.
Answer: The largest two-year increase in unemployment was from 1990 to
1992.
◍ Given the function C(p)=20-p, which of these would be a coordinate on the
graph? A. (5, 16)B. (5, 18)C. (5, 17)D. (5, 15).
Answer: D
◍ The profit function P(x) gives a company's total profit (in millions of U.S.
dollars) for x products produced (in thousands). The graph of P(x) is
below:At which number of products produced does the company stop being
profitable?.
Answer: About 4,500 items
◍ inequality.
Answer: A mathematical sentence that shows the relationship between
quantities that are not equivalent
◍ Global Maximum.
Answer: Finds the highest y-number the function goes to
◍ A bank begins a marketing campaign to increase its number of customers.
Each month, all new customers are put into a drawing. One customer then
receives a $50 credit in a checking account.The amount of money given
away in the drawing, G, is a function of the number of months, M, the
drawing has been going on for. What is the correct function notation to
represent the amount of money given away after the drawing has been going
on for 5 months?.
Answer: G(5) = 250
◍ response variable.
