WGU C957 EXAM PREP SOLVED
QUESTIONS ACCURATE ANSWERS
PREMIUM REVIEW
◉ 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
QUESTIONS ACCURATE ANSWERS
PREMIUM REVIEW
◉ 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
