Question

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Answer 1

Answer:

1)The ratio of first pair is 1:3

The ratio of second pair is 1:3

Therefore, They are proportional

2)The ratio of first pair is 1:7

The ratio of second pair is also 1:7

Therefore, They are proportional

3)The ratio of first pair is 2:1

The ratio of second pair is 1:2

Therefore, they are not proportional

4)The ratio of first pair is 1:10

The ratio of second pair is 4:1

Therefore they are not proportional

Answer 2

Answer:

first two are proportional

and the other are non proportional