Practice Test

Question 4 • Mathematics 8

Suppose there is a relationship between independent and dependent variables represented by a scatterplot. Which statement is correct?

Answer

The independent variable influences change in the dependent variable whether the points on the scatterplot go up or down from left to right.

The dependent variable influences change in the independent variable whether the points on the scatterplot go up or down from left to right.

The independent variable influences change in the dependent variable only if the points on the scatterplot go up from left to right.

The dependent variable influences change in the independent variable only if the points on the scatterplot go up from left to right.

Explanation

The independent variable is the variable used to explain or predict changes in the dependent variable. A scatterplot can slope upward (a positive relationship) or downward (a negative relationship); either direction can show how changes in the independent variable are associated with changes in the dependent variable. The slope’s direction does not reverse which variable is independent.

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