Let $\displaystyle {f{{\left({x}\right)}}}={\left\lbrace\begin{array}{ccc} {m}{x}-{5}&\text{if}&{x}<-{3}\\{x}^{{2}}+{6}{x}-{2}&\text{if}&{x}\geq-{3}\end{array}\right.}$

If $\displaystyle {f{{\left({x}\right)}}}$ is a function which is continuous everywhere, then we must have
$\displaystyle {m}=$Preview Question 6