Persamaan garis lurus yang melalui titik (-2,-4) Dan titik (-4,3) adalah

x - x1 / x2-x1 = y - y1 / y2 - y1
[x-(-2)] / [-4-(-2)] = [y-(-4)] / [3-(-4)]
[x+2] / -2 = [y + 4] / 7
7 [x+2] = -2 [y+4]
7x+14 = -2y - 8
7x + 2y +14 + 8 = 0
7x + 2y +22 = 0