The graph appears to be the linear function y = x + 2, with a hole at (1,3).
Just like the graph of y = x + 2, this function will go up (y →+∞) as we move to the right (x →∞)
Refer to the hint in part (a).
As the graph approaches the hole from the left (x → −1), what y-value does it approach?
Refer to the hint in part (c).