Exploring Types of Discontinuities Practice Test

Let $r(x)=\begin{cases}x^2,&x\le1\\x^2+2,&x>1\end{cases}$. What type of discontinuity occurs at $x=1$?

Consider $t(x)=\begin{cases}\frac{x^2-1}{x-1},&x\ne1\\2,&x=1\end{cases}$. What type of discontinuity occurs at $x=1$?