H(x)=x^2+1. K(x)=x-2. (H-k)(3)

How do i do this activity, is appreciated

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite