Question 378878
Use the slope-intercept form of a line, {{{y=mx+b}}}
{{{y=(1/7)x+b}}}
Then use the point to determine {{{b}}}.
{{{3=(1/7)(-1)+b}}}
{{{21/7+1/7=b}}}
{{{b=22/7}}}

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{{{highlight(y=(1/7)x+22/7)}}}
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{{{drawing(300,300,-5,5,-5,5,grid(1),circle(-1,3,0.2),graph(300,300,-5,5,-5,5,0,(1/7)x+22/7))}}}