A curve $\displaystyle y=f(x)$ with the gradient function $\displaystyle \frac{dy}{dx}=\frac{x^2}{3x-1}.$

The straight line $\displaystyle ky=2x-7$ is normal to the curve $\displaystyle y=f(x)$ at $\displaystyle (2,m)$.Find the value of $\displaystyle k$ and $\displaystyle m$.

any help will appreciate,.