Item b

On the plot below, graph the lines

\begin{equation*} \begin{aligned} y \amp = x+1 \\ y \amp = x-1\text{.} \\ \end{aligned} \end{equation*}

At what point or points \((x,y)\text{,}\) do the lines intersect? How many points \((x,y)\) satisfy both equations?

in-context