Question 683664
1.  Find slope

{{{(8--7)/(-8--9) = (8+7)/(-8+9) = 15/1 = 15}}}
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2.  Use slope and one point in point-slope formula
y - 8 = 15(x--8)
y - 8 = 15(x+8)
y - 8 = 15x + 120
y = 15x + 120 + 8
y = 15x + 128
{{{highlight_green(-15x + y = 128)}}}
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