Question

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

Answer 1

`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`