Question

Question 16

Both x and y vary directly with each other and when x is 10, y is 14, which of the following is not a possible pair of corresponding values of x and y?
(a) 25 amd 35
(b) 35 and 25
(c) 35 and 49
(d) 15 and 21

Answer 1

Both x and y vary directly with each other.
i.e. $x\propto y$.
If x=10 and y =14
So, $10\propto 14$ or $5\propto 7$
This proportion is not follow in option (b) pairs.
Hence, option (b) is correct.