strate line tween 2 points: (-3,-2) & (-0.5,3)...then extend it 80%
deltax=-0.5 -(-3)=2.5
deltay=3 -(-2)=5
distans=root(2.5^2+5^2)=root(6.25 +25)=root(31.25)=5.590169944
add 80%...1.8*5.59....=10.0623059
###### if yu wanna put nu point at end av extended line...
slope=deltay/deltax=0.5
from original point (-3,-2) deltax=2.5*1.8=4.5, so nu x=-3+4.5=1.5
deltay=1.8*5=9, no nu y=-2+9=7
nu point=(1.5,7)