slope=rise/run
se how many units it goes up and how many units it goes to the right
from (-3,0) to (0,6), it goes up 6 units total and goes 3 units to right therefor
6/3=2=slope
slope=2
or the longer way is
slope=(y2-y1)/(x2-x1)
slope=(6-0)/(0-(-3))=6/(0+3)=6/3=2
slope=2