Question 1105317
Your given data is fit for the point slope form of equation.  Just make the adjustment according to the description, and pick the right choice.


For perpendicular, what slope do you need?
{{{m[a]*m[b]=-1}}}, and let's say you are given {{{m[a]}}}.


Next you need to know where the coordinate values go in the equation form.  Watch for signs carefully.  You already can see how yours starts.