Question 35Let $L(m)$ be the $x$-coordinate of the left endpoint of the intersection of the graphs of $y=x^2-6$ and $y=m,$ where $-6\lt m\lt6.$ Let $r=\frac{[L(-m)-L(m)]}{m}.$ Then, as $m$ is made arbitrarily close to zero, the value of $r$ is:arbitrarily close to zeroarbitrarily close to $\dfrac1{\sqrt6}$arbitrarily close to $\dfrac2{\sqrt6}$arbitrarily largeundetermined