Answer:
1. it is answered already.
2. y=mx + b
y= 1/2 x + 3
to find the x, we let y=0,
then 0=1/2 x +3
x= -6
to find the y, we let x=0, then y=1/2(0) + 3
y= 3
:the line passes thru (-6,0) and (0,3)
3. y=mx+b
y=3x+(-3/2) or y= 3x-(3/2)
to find the x , let y=0
0=3x - (3/2)
x=1/2
to find the y, let y=0
y= -(3/2)
:the line passes thru (1/2,0) and (0,-3/2)