Question

If x and y are directly proportional and when x=13, y=39, which of the following is not a possible pair of corresponding values of x and y?
a) 1 and 3
b) 17 and 51
c) 30 and 10
d) 6 and 18
.​

Answer 1

Answer:

c). 30and 10

if X=10 and y=30 then it will be correct.

Answer 2

Answer:

According to me THE ANSWER IS (C)30&10

Step-by-step explanation:

See,If they are Directly proportional then,

When x is increased y is increased

But in option C we see that x>y i.e contradicting the fact that they are Directly proportional so (C) is the Answer

AND

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