How to find coefficient of variation Suppose  2x−3y=  5  is  the  relation  between  the  variables x and y .If  the variance of x be 1.44 and y has mean 1, then calculate the coefficient of variation of x

I'll answer as if this had a self-study tag:
According to https://en.wikipedia.org/wiki/Coefficient_of_variation

The coefficient of variation (CV) is defined as the ratio of the standard deviation $\sigma$ to the mean $\mu$.

The mean of $y$ is explicitly stated, so no problem with that. The standard deviation of $y$ will in some way or another depend on the standard deviation of $x$. To find out, you might want to change the equation to something in the form of $y=\dots$
