Need answering these two questions

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

Which function has the domain x> -11?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x