Question 251022
3x - y - 1 = 0  
If y=0 then  3x-0-1=0
3x=1
x=1/3
(1/3,0)
if x=0 then 
3*0-y-1=0
3-y=0
3=y
(0,3)

(0,3) and (0,1)
substituting (0,1)
3x - y - 1 = 0 
3(0)-1-1=0
-2=0
(0,1) are not on the line