??????????????????? "passesesesse thru" ???????????
a line GO THRU points
points: (2,-3) & (3,-5)
deltax=1, deltay=-2, slope=deltay/deltax=-2/1=-2
y=-2x+konst
projekt line from 2 tu 0...deltax=-2, deltay=deltax*slope=-2*(-2)....=+4
at x=0, y=-3+4=1
y=-2x+1