APPLIED ALGEBRA C957 WGU OA
ACTUAL EXAM 2026 REAL QUESTIONS
WITH PRACTICE SOLUTIONS GRADED A+
⩥ A measure of how well a regression function fits the data; closer to 1
indicates a better fit.
Answer: Coefficient of determination (r²)
⩥ The regression function that will have the highest r² value when
calculated using least squares regression for logistic regression.
Answer: Best-fit logistic function
⩥ Data points that negatively affect regression functions and r², reducing
the accuracy of the model.
Answer: Outliers
⩥ Investigate the cause; keep if normal, remove if due to abnormal
circumstances.
Answer: Handling outliers
⩥ Removing a true outlier always increases the r² value.
Answer: Effect of removing true outlier
,⩥ The change in one variable with respect to another over an interval.
Answer: Average rate of change
⩥ The change in one variable with respect to another at a specific point.
Answer: Instantaneous rate of change
⩥ Units of the dependent variable divided by units of the independent
variable.
Answer: Units for rate of change
⩥ Use the slope formula: (change in y)/(change in x).
Answer: Finding average rate of change
⩥ It approaches zero as the interval gets wider.
Answer: Average rate of change in logistic functions
⩥ It approaches zero for large positive or negative x-values in a logistic
function.
Answer: Interpretation of instantaneous rate of change
⩥ The steeper line or curve indicates the greater rate.
Answer: Visual determination of average rates of change
, ⩥ Determined by which tangent line at a point is steeper.
Answer: Visual comparison of instantaneous rates of change
⩥ Controls how quickly the function increases or decreases.
Answer: Exponent's coefficient in logistic function
⩥ Indicates that the modeled quantity is decreasing.
Answer: Positive exponent in logistic function
⩥ Indicates that the modeled quantity is increasing.
Answer: Negative exponent in logistic function
⩥ Causes the function to grow or decrease faster.
Answer: Larger magnitude exponent in logistic functions
⩥ Describes the shape of a graph; concave up looks like y = x², concave
down like y = -x².
Answer: Concavity
⩥ Where the graph changes concavity and the rate of change is at its
maximum or minimum.
ACTUAL EXAM 2026 REAL QUESTIONS
WITH PRACTICE SOLUTIONS GRADED A+
⩥ A measure of how well a regression function fits the data; closer to 1
indicates a better fit.
Answer: Coefficient of determination (r²)
⩥ The regression function that will have the highest r² value when
calculated using least squares regression for logistic regression.
Answer: Best-fit logistic function
⩥ Data points that negatively affect regression functions and r², reducing
the accuracy of the model.
Answer: Outliers
⩥ Investigate the cause; keep if normal, remove if due to abnormal
circumstances.
Answer: Handling outliers
⩥ Removing a true outlier always increases the r² value.
Answer: Effect of removing true outlier
,⩥ The change in one variable with respect to another over an interval.
Answer: Average rate of change
⩥ The change in one variable with respect to another at a specific point.
Answer: Instantaneous rate of change
⩥ Units of the dependent variable divided by units of the independent
variable.
Answer: Units for rate of change
⩥ Use the slope formula: (change in y)/(change in x).
Answer: Finding average rate of change
⩥ It approaches zero as the interval gets wider.
Answer: Average rate of change in logistic functions
⩥ It approaches zero for large positive or negative x-values in a logistic
function.
Answer: Interpretation of instantaneous rate of change
⩥ The steeper line or curve indicates the greater rate.
Answer: Visual determination of average rates of change
, ⩥ Determined by which tangent line at a point is steeper.
Answer: Visual comparison of instantaneous rates of change
⩥ Controls how quickly the function increases or decreases.
Answer: Exponent's coefficient in logistic function
⩥ Indicates that the modeled quantity is decreasing.
Answer: Positive exponent in logistic function
⩥ Indicates that the modeled quantity is increasing.
Answer: Negative exponent in logistic function
⩥ Causes the function to grow or decrease faster.
Answer: Larger magnitude exponent in logistic functions
⩥ Describes the shape of a graph; concave up looks like y = x², concave
down like y = -x².
Answer: Concavity
⩥ Where the graph changes concavity and the rate of change is at its
maximum or minimum.
