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Direct Proportion
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☼ Direct Proportion : Two quantities are said to be directly proportional if on the increase or decrease of the one, the other increases or decreases proportionately.
e.g. (i) 7 ball pen cost Rs. 35
∴ 9 ” ” ” ( ? )
= Rs. 45
(ii) 7 ball pen cost Rs. 35
∴ 4 ” ” ” ( ? )
= Rs. 20
‘ One variable increases (↑) than other increases (↑) and similarly one variable decreases (↓) than other variable decreases (↓) ’ Direct Proportion.
