A Straight Line Falls When Moving Rightward Along It

question 165

Multiple Choice

A straight line falls when moving rightward along it.Hence the slope of the line is

• A) positive.
• B) negative.
• C) undefined.
• D) zero because it is a straight line.
• E) perhaps positive, negative, or zero, but without more information it is impossible to determine.

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Definitions:

Independent Variable

A variable in an experiment that is manipulated to observe its effects on a dependent variable.

Internal Validity

The extent to which a study provides evidence that a causal relationship exists between the variables it examines, free from confounding factors.

Random Assignment

Use of a random "chance" procedure (such as a random number generator or coin toss) to determine the condition in which an individual will participate.

Confounding Variable

A factor other than the independent variable that might produce an effect in an experiment, leading to inaccurate results if not controlled.