Question 893291
Use the point slope form of a line,
{{{y-10=-3(x-(-3))}}}
{{{y-10=-3(x+3)}}}
{{{y-10=-3x-9}}}
{{{y=-3x+1}}}
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{{{drawing(300,300,-10,10,-5,15,grid(1),circle(-3,10,0.3),graph(300,300,-10,10,-5,15,-3x+1))}}}
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When {{{y=-5}}}
{{{-5=-3x+1}}}
{{{-3x=-6}}}
{{{x=2}}}
(2,-5)