A Day@SST Scenario
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Scenario 1
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It is the December holidays and you have decided to apply for part-time work at the fast food outlet, Macdonalds. The pay is \$4 per hour.
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Number of hours (x)012345
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Amount earned in \$(y)048121620
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1What do you notice about the amount earned when the number of hours of work increases? Describe your observation in the box below.
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2Let's see how the numbers in each column interact! We are apply the four operations on the numbers for each column. The first example has been done for you:
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Number of hours (x)012345
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Amount earned in \$(y)048121620
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Subtract: x - y0-3-6-9-12-15
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Product: xy04163664100
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Divide: y/xundefined44444
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3What do you notice about the numbers from the table?
Is there a pattern generated from each of the four operations?
Describe your observation in the box below.
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Subtract: x - y
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Product: xy
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Divide: y/x
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4Which of the four operations (addition, subtraction, multiplication or division) gives a number which is the same for the table that you have completed?
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In conclusion, the operation that gives a constant or the same number for your answer actually illustrates a DIRECT PROPORTION relationship.
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5Let's draw a graph to illustrate the direct proportion relationship between the number of hours worked and the amount earned. Key in the numbers for the table given above to generate the graph.
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Number of hours (x)012345
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Amount earned in \$(y)048121620
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