WGU C957 PRACTICE PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉coefficient of determination. Answer: A statistic that measures
how well a regression prediction approximates the real data points.
An r^2 of 1 indicates that the regression prediction is a perfect fit for
the data
◉common ratio. Answer: The number by which each term in a
sequence is multiplied to find the next number in the sequence; for
example 4 is the common ratio for the sequence [1, 4, 16, 64, 256...]
◉Constant ratio. Answer: Occurs when the numeric relationship
between two quantities- that is, how many times one number
contains the second- remains unchanged over time
◉Data regression. Answer: The process of examining data points to
determine a valid equation. "Regression" refers to bringing different
data points down toward a normal average- "regressing" them
◉equation. Answer: A mathematical sentence that contains an
equals sign.
, ◉explanatory variable. Answer: A variable that, as it changes, affects
another variable (called the response variable); for example, as a
person pumps more gas into a car's tank(the explanatory variable),
the cost of the purchase rises (the response variable)
◉exponent. Answer: A mathematical notation indicating the number
of times a quantity is multiplied by itself.
◉exponential function. Answer: a function of the form f(x) = ab^x,
where a and b are real numbers with a ≠ 0, b>0, and b ≠ 1
◉extrapolation. Answer: the act of estimation by projecting known
information
◉f(x)=mx+b. Answer: linear function
◉f(x) = mx. Answer: A very basic function
◉function. Answer: A relation based on a set of inputs and a set of
possible outputs where each input is related to exactly one output
◉function notation. Answer: a way to name a function that is
defined by an equation
QUESTIONS WITH SOLUTIONS GRADED A+
◉coefficient of determination. Answer: A statistic that measures
how well a regression prediction approximates the real data points.
An r^2 of 1 indicates that the regression prediction is a perfect fit for
the data
◉common ratio. Answer: The number by which each term in a
sequence is multiplied to find the next number in the sequence; for
example 4 is the common ratio for the sequence [1, 4, 16, 64, 256...]
◉Constant ratio. Answer: Occurs when the numeric relationship
between two quantities- that is, how many times one number
contains the second- remains unchanged over time
◉Data regression. Answer: The process of examining data points to
determine a valid equation. "Regression" refers to bringing different
data points down toward a normal average- "regressing" them
◉equation. Answer: A mathematical sentence that contains an
equals sign.
, ◉explanatory variable. Answer: A variable that, as it changes, affects
another variable (called the response variable); for example, as a
person pumps more gas into a car's tank(the explanatory variable),
the cost of the purchase rises (the response variable)
◉exponent. Answer: A mathematical notation indicating the number
of times a quantity is multiplied by itself.
◉exponential function. Answer: a function of the form f(x) = ab^x,
where a and b are real numbers with a ≠ 0, b>0, and b ≠ 1
◉extrapolation. Answer: the act of estimation by projecting known
information
◉f(x)=mx+b. Answer: linear function
◉f(x) = mx. Answer: A very basic function
◉function. Answer: A relation based on a set of inputs and a set of
possible outputs where each input is related to exactly one output
◉function notation. Answer: a way to name a function that is
defined by an equation
