Unit 1: Slope and Rate of Change. - St John Brebeuf
Unit 1: Slope and Rate of Change. - St John Brebeuf
Unit 1: Slope and Rate of Change. - St John Brebeuf
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Apprenticeship <strong>and</strong> workplace Math 11<br />
<strong>St</strong>.<strong>John</strong> <strong>Brebeuf</strong><br />
Example 1<br />
Karli <strong>and</strong> Josef drive delivery trucks. Karli gets paid $20 per hour <strong>and</strong><br />
Josef gets paid $16 per hour plus a $20 gas allowance at the beginning<br />
<strong>of</strong> each workday for using his own vehicle.<br />
a) Write an equation to calculate each person’s earnings.<br />
Use p for pay <strong>and</strong> h for hours. Graph 5 points <strong>of</strong> data for each<br />
person on the same graph.<br />
b) Who makes more money after 3 hours <strong>of</strong> work <strong>and</strong> how much more<br />
c) When will they make the same amount <strong>of</strong> money<br />
d) Who makes more after 9 hours <strong>of</strong> work <strong>and</strong> how much more<br />
e) Calculate the slope for each graph. What can you conclude from<br />
these values<br />
Solution:<br />
a)<br />
Karli<br />
Josef<br />
Hours Pay Hours pay<br />
1 20 1 36<br />
2 40 2 52<br />
4 4<br />
6 6<br />
8 8<br />
S.Duffy Page 10
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