persamaan garis lurus yang melalui titik(-2,-4) dan titik (-4,3)

<=> (y-(-4))/(3-(-4))=(x-(-2))/(-4-(-2))
<=> (y+4)/(3+4)=(x+2)/(-4+2)
<=> (y+4)/7=(x+2)/(-2)
<=> -2y-8=7x+14
<=> -2y=7x+14+8
<=> -2y=7x+22