To find the equation that goes through this you first want to find the slope.
Take the difference of the rise over run.
Change in Y = 11-(-2) = 13
Change in X = 1-1 = 0
This gives you a slope that is undefined because the line is vertical.
To clarify, however, you do not need to find the slope in this instance as you can tell by the points/coordinates that X is constant between both points.
Therefore, your equation is simply x= 1