Three variables are related and two of them are plotted in a figure.If the variable that is not measured on either the x-axis or the y-axis changes,then there is
A) a movement along the drawn curve.
B) a shift in the curve.
C) no impact on the curve because the variable is not measured on either of the axes.
D) either a shift in the curve or a movement along the curve, but more information is needed to determine which.
E) None of the above answers is correct.

Question

Quizplus · Accepted Answer

If the variable that is not measured on either the x-axis or the y-axis changes, then it would cause a shift in the curve. This is because the third variable affects both the x-axis and y-axis variables and thus cannot be represented by a simple movement along the drawn curve. Therefore, the best choice would be B, a shift in the curve.

Three Variables Are Related and Two of Them Are Plotted