What is the equation of the line that passes through (44.2, -22.8) and (25.2, 34.2)?

1 Answer
Mar 2, 2018

y+3x=109.8

Explanation:

=>y=mx+b

=>y=(y_2 -y_1)/(x_2-x_1)*x+b

=>y=(34.2-(-22.8))/(25.2-44.2)*x+b

=>y=(34.2+22.8)/(-19)*x+b

=>y=57/(-19)*x+b

=>y=-3x+b

=>y+3x=b

Put coordinates of any of the two points.

=>-22.8+3*(44.2)=b

=>-22.8+132.6=b

=>109.8=b

So, the equation is
y+3x=109.8