Y - y1 = m(x - x1) slope(m) = 4 (-3,7)...x1 = -3 and y1 = 7 now we sub y - 7 = 4(x - (-3) = y - 7 = 4(x + 3) <=== ==================== y - y1 = m(x - x1) slope(m) = 6 (7,4)...x1 = 7 and y1 = 4 now we sub and solve y - 4 = 6(x - 7) <== =================== y - y1 = m(x - x1) slope(m) = 6 (-8,3)....x1 = -8 and y1 = 3 sub y - 3 = 6(x - (-8) = y - 3 = 6(x + 8) <== ===================== (-4,5)(-2,2) slope = (2 - 5) / (-2 - (-4) = -3/(-2 + 4) = -3/2
y - y1 = m(x - x1) slope(m) = -3/2 (2,-4)....x1 = 2 and y1 = -4 sub y - (-4) = -3/2(x - 2) = y + 4 = -3/2(x - 2) <== ===================== (50,1.25)(100,1.85) slope = (1.85 - 1.25) / (100 - 50) = 0.6/50 = 0.012
y = mx + b slope(m) = 0.012 use any of ur points...(50,1.25)...x = 50 and y = 1.25 now sub and find b, ur y int 1.25 = 0.012(50) + b 1.25 = 0.6 + b 1.25 - 0.6 = b 0.65 = b
