P/4+8=7 what is p?me out here (having trouble)

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 is the equation of a line perpendicular to the line with the equation 3x+4y=8

Me asap! what is the slope of this line? enter your answer in the box.