Question 883935
Vertical lines have the form, {{{x=c}}}
In this case, {{{x=4}}}
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A parallel line would have the same form, {{{2x-5y=D}}}
Use the point to solve for {{{D}}}
{{{2(-9)-5(3)=D}}}
{{{-18-15=D}}}
{{{D=-33}}}
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{{{2x-5y=-33}}}
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{{{drawing(300,300,-10,10,-10,10,grid(1),circle(-9,3,0.5),graph(300,300,-10,10,-10,10,(2x-35)/5,(2x+33)/5))}}}