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SAT Maths: What is Direct Variation?

Let the cost of 1 pen be $12. By unitary method, we can find the cost of any number of pens. Clearly, the cost of 2 pens is $ 24; the cost of 3 such pens is $ 36; the cost of 5 such pens is $ 60; the cost of 8 such pens is $ 96 and so on…

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Published 1 year 29 weeks ago
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