Question 356884
Find two points. 
Let {{{x=0}}}
{{{y=-3(0)=0}}}
({{{0}}},{{{0}}})
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.
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Let {{{x=1}}}
{{{y=-3(1)=-3}}}
({{{1}}},{{{-3}}})
Plot the two points and connect them with a line.
{{{drawing(300,300,-6,6,-6,6,grid(1),circle(0,0,0.2),circle(1,-3,0.2),graph(300,300,-6,6,-6,6,-3x))}}}