Sarthaks Test
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In which of the following tables x and y vary directly?

(i)

A79132125
B2127396375

(ii)

A1020304046
B510152023

(iii)

A23456
B69121720

(iv)

A1222324252
B1323334333

1 Answer

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Best answer

(i) Directly proportional.

Explanation: In this table value of ‘b’ is thrice the value of ‘a’ in all the columns. Therefore ‘a’ and ‘b’ are directly proportional.

(ii) Directly proportional.

Explanation: In this table value of ‘b’ is half of the value of ‘a’ in all the the columns. Therefore ‘a’ and ‘b’ are directly proportional.

(iii) Not directly proportional.

Explanation: In this table value of ‘b’ is not thrice the value of ‘a’ in all the columns. Therefore ‘a’ and ‘b’ are not directly proportional.

(iv) Not directly proportional.

Explanation: In this table value of ‘b’ is not varying in the same ratio as the value of ‘a’ in all the columns. Therefore ‘a’ and ‘b’ are not directly proportional.

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