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Hours<br />

Worked<br />

8-<br />

7-<br />

6-<br />

5-<br />

4- .<br />

.<br />

.<br />

3- .<br />

2-<br />

1- .<br />

.<br />

0 <br />

0 1 2 3 4 5 6 7 8 9 10 11 12<br />

.<br />

.<br />

Lawns Mowed<br />

If Moe increases the number of hours worked from 3 hours per day to 6 hours per day, the<br />

quantity of lawns mowed will increase from 3 lawns to 6 lawns. This is a movement along the<br />

curve from point A to point B, as illustrated on the graph below:<br />

Hours<br />

Worked<br />

8-<br />

7-<br />

6-<br />

5-<br />

4- .<br />

.<br />

. B<br />

3-<br />

A.<br />

2-<br />

1- .<br />

.<br />

0 <br />

0 1 2 3 4 5 6 7 8 9 10 11 12<br />

.<br />

.<br />

Lawns Mowed<br />

If a variable other than one of the variables illustrated on the graph changes, the relationship<br />

between the variables illustrated on the graph may change. This shifts the curve illustrating the<br />

relationship between the variables.<br />

Example 15B: Moe purchases a new, larger lawn mower. The new mower increases Moe’s<br />

productivity. The table below and the graph on the next page show the new relationship between<br />

the number of hours Moe works each day and the number of lawns he can mow with the new<br />

mower.<br />

Hours Worked Lawns Mowed-New Mower<br />

1 1.5<br />

2 3.0<br />

3 4.5<br />

4 6.0<br />

5 7.5<br />

6 9.0<br />

7 10.5<br />

8 12.0<br />

FOR REVIEW ONLY - NOT FOR DISTRIBUTION<br />

Trade and Economic Systems 2 - 8

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