Question

Both $xandy$ vary directly with each other and when $xis10,yis14$, which of the following is not a possible pair of corresponding values of $xandy$?

• A. $25and35$
• B. $35and25$
• C. $35and49$
• D. $15and21$

Answer 1

The correct option is B

$35and25$

$xandy$ are directly proportional.

$x\propto y$

If $x=10andy=14,$ then;

$10\propto 14or5\propto 7$

Now, if we compare,

$\left(a\right)25\propto 35=5\propto 7$

$\left(b\right)35\propto 25=7\propto 5$

$\left(c\right)35\propto 49=5\propto 7$

$\left(d\right)15\propto 21=5\propto 7$

Therefore, option $\left(b\right)$ is not a possible pair of corresponding values of$xandy.$