Question 354858
Use the slope, which is the change in y divided by the change in x.
{{{m=(DELTA*y)/(DELTA*x)=-(1/3)}}}
Starting from ({{{-2}}},{{{6}}}).
If you move {{{3}}} in the x, then using the slope you should move {{{-1}}} in the y.
{{{X}}}:{{{-2+DELTA*x=-2+3=1}}}
{{{Y}}}:{{{6+DELTA*y=6-1=5}}}
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({{{1}}},{{{5}}}) is another point on the graph. 
Plot the two points and connect them with the line.
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{{{drawing(300,300,-6,6,-4,8,circle(1,5,0.35),circle(-2,6,0.35),grid(1),graph(300,300,-6,6,-4,8,-(1/3)x+16/3))}}}