???????????? "passeseseessss x" ??????????
a strate line GO THRU points
point: (8,-9) & (12,-15)
deltax=4, deltay=-6, slope=deltay/deltax=-6/4=-3/2...-1.5
y=-1.5x+konst
projekt line fron x=8 tu x=0...deltax=-8, deltay=slope*deltax=-1.5*-8
deltay=+12, so y=-9+12=3
this point...(0,3)
line: y=-1.5x+3
if yu absolutely insist on x/a, then a=1/slope=-1/1.5...-0.66666666666666666666...