(11,97)(18,153)
slope(m) = (y2 - y1) / (x2 - x1) = (153 - 97) / (18 - 11) = 56/7 = 8
y = mx + b
slope(m) = 8
use either of ur points...(11,97)...x = 11 and y = 97
now we sub and find b, the y int
97 = 8(11) + b
97 = 88 + b
97 - 88 = b
9 = b
so ur slope intercept equation is : y = 8x + 9 <==