Question

Which of the following is variable

• A. $15$
• B. $-10$
• C. $3$
• D. $\mathrm{y}$

Answer 1

The correct option is D

$\mathrm{y}$

Constant is the fixed value while the variable is a varying value.

It is denoted by any alphabetical letter from $\mathrm{a}$ to $\mathrm{z}$.

Thus, Option D $\mathrm{y}$ is the variable in this case while remaining all the options are constants