Question

Write the equation of a line that passes through points 1, 1 and -2, 10

Answer 1

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

Answer 2

Y= -3+4
 
  
slope= -3
y int= 4