Question 835328
Parallel lines have identical slopes.
{{{y=-2x+b}}}
Now use the point to solve for {{{b}}}
{{{-7=-2(1)+b}}}
{{{b=-5}}}
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{{{highlight_green(y=-2x-5)}}}
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{{{drawing(300,300,-6,6,-10,2,grid(1),circle(1,-7,0.25),graph(300,300,-6,6,-10,2,-2x+2,-2x-5))}}}