The Following Equation Describes Variables That Are Directly Proportional

question 8

Multiple Choice

The following equation describes variables that are directly proportional.
y = 5x Which of the following is true if x has a negative value and is increased from -5 to -2?

• A) The value of y will decrease.
• B) The value of y will increase.
• C) The value of y will no longer be proportional to the value of x.
• D) The value of y will remain the same.

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Definitions:

Scatterplot

A type of graphical representation that displays values for typically two variables for a set of data, using Cartesian coordinates to display the values.

Outlier

An outlier is an observation in a data set that is distant from other observations, often indicating variability in measurement or a potential error.

Categorical Variable

A type of variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual or other unit of analysis to a particular group or nominal category.

Cubed-Root Transformation

A statistical technique used to stabilize variance, make the data more closely conform to a normal distribution, or improve the interpretability of data with skewed distributions.