1. -1/3 - (-1/2) = .16666666666666
2. -8
Hope it helps, if you need it in fractions, you can always convert it :)
Answer:
See explanation.
Step-by-step explanation:
We need a point and a slope to have a point slope equation.

We need a slope and y-intercept to write in slope intercept form.

A)
or 
B) 
C) 
D) 