strate line thru 2 points...(-5, -10) & (3, 8)
deltax=3-(-5)=8
deltay=8-(-10)=18
slope=deltay/deltax=18/8=2.25
y=2.25x +konst
projekt line from x=3 tu x=0...this deltax=-3
deltay=slope*deltax=2.25+(-3)=-6.75
y=8-6.75 =1.25..point=(0,1.25)
y=2.25x +1.25