Question 185892
Slope of:
(8,7)(1,-7) 
m = (y2-y1)/(x2-x1)
m = (-7-7)/(1-8)
m = (-14)/(-7)
m = 2
.
Stuffing one of the points say (8,7) and the slope into the point-slope form:
y - y1 = m(x - x1)
y - 7 = 2(x - 8)
y - 7 = 2x - 16
y = 2x - 9