Question

Find the equation of the line that runs through points (1,3) and (2, -1)

Answer 1

y=-4x+7

Explanation:

m=(y2-y1)/(x2-x1)

m=(-1-3)/(2-1)

m=-4/1

m=-4

y-y1=m(x-x1)

y-3=-4(x-1)

y=-4x+4+3

y=-4x+7