FIGURE APX-4 DERIVING THE DEMAND FOR WALL CLIMBING USING INDIFFERENCE CURVE ANALYSIS

In panel A, when wall climbing costs $20 per hour, your optimal choice is found at point
a. When the price of wall climbing rises to $30 per hour, this produces a new budget line,
cd, shifting the optimal choice to point
b. Transferring points
a and
b down to panel B and connecting the points generate the demand curve for wall climbing.