Answer :
We have the following:
[tex]2x=11[/tex]The formula of a line is the following
[tex]y=mx+b[/tex]where m is the slope
resolving
[tex]\begin{gathered} 2x=11 \\ x=\frac{11}{2} \end{gathered}[/tex]In this case our line is a straight line parallel to the y axis, therefore there is no slope, that is, the slope is 0