Question

find the equation of a line passing through (1,2) and (-2,5)

Answer 1

solve the slope

slope = (2-5) / (1 + 2)
slope = -3/3 = -1

y = mx + b
2 = -1(1) + b
3 = b

y = mx + b
y = -x + 3
x + y = 3

Answer 2

thank you