Exhibit 1A-6 Straight line
-A change in a third variable not on either axis of a graph is illustrated with a:
A) horizontal or vertical line.
B) movement along a curve.
C) shift of a curve.
D) point of intersection.

Question

Exhibit 1A-6 Straight line 
-A change in a third variable not on either axis of a graph is illustrated with a:
A) horizontal or vertical line. 
B) movement along a curve. 
C) shift of a curve. 
D) point of intersection.

Quizplus · Accepted Answer

A shift of a curve is often used to illustrate a change in a third variable not on either axis of a graph. This could be a shift in the demand or supply curve in an economics graph or a shift in the production possibilities curve in a microeconomics graph. Horizontal or vertical lines do not capture the full range of potential changes in a third variable, and movement along a curve may not reflect a change in a third variable at all. A point of intersection may reflect a relationship between two variables but does not illustrate a change in a third variable.

Exhibit 1A-6 Straight Line