help out a lad with no math skills. 1-2 Graph and vertex tables 3-4 Substitution and 5 is your choice.​

On a piece of paper, graph . then determine which answer choice matches the graph you drew

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]

What is the y-intercept of the line given by the equation