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Draw a line though the points. How much money is saved in 5 weeks

Draw a line though the points. How much money is saved in 5 weeks-example-1

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You are right, it is $75.

If you draw a line through the points, you can see that the line is linear, meaning that the line has the same slope. The slope of the line is 3/2 or 1.5, because from each point, you are going up 1.5 units, and to the right 1 unit. From the 4th week, if you go up 1.5 units and to the right 1 unit, at the 5th week your y value will be 75.

User Denis Khvorostin
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