Respuesta :
slope = (10 - 1)/(-2-1) = 9/-3 = -3
pass thru (1,1)
y = mx + b
1 = -3(1) + b
1 + 3 = b
so b = 4
equation: y = -3x + 4
pass thru (1,1)
y = mx + b
1 = -3(1) + b
1 + 3 = b
so b = 4
equation: y = -3x + 4