In the following table, find the value of a and b if the quantities x and y are in direct variation.

x

9

12

b

y

27

a

75

Asked by Topperlearning User | 2nd Sep, 2015, 01:20: PM

Expert Answer:

Since x and y vary directly, so the ratio must be constant.

So we have,

Consider,

 

Again,


Hence, a = 36 and b = 25.

Answered by  | 2nd Sep, 2015, 03:20: PM

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