I have the following graph:
$h(t) = \begin{cases} 2t+1, & \mathrm{if}\ t \le -1, \\ 3t, & \mathrm{if}\ -1 < t < 1, \\ 2t-1, & \mathrm{if}\ t \ge 1.\end{cases}$
The question I have to answer is: Give the conditions which would make the function $h$ continuous at the point $t = a$.
This question does not make sense to me. Firstly there is no a in the equation, and secondly it does not matter what value i would give to $t$, this function can never be continuous.
Do I misunderstand what is required here?