How do I find the intercepts of each line.

1. 3x-4y=12
2. y=-2
3. f(x)=4/5x+7
4. x=5

please help!

1. solve for y; put in form of y=mx+b
2. y=-2 is the same as y=0x-2
3. f(x) means y=
4. similar to 2