$$\mathrm{\ }$$Well, if you have a graph handy, I would just plot the points and go from there.
If you don't have a graph, ask yourself...what's the difference between these two lines?
From the point (1,-4), you go over 4 and up 6 to get to the next point.
So, our slope is 6/4 or 3/2.
In the slope intercept form, we have Y=3/2X+b
b is the Y intercept.
How do we figure out b?
From point (1,-4) we could go over 1 to get to the Y intercept., and our slope is up 3 over 2 (or 3/2)
If we divide the top and bottom by 2, we get 1.5 over 1. Meaning, to go over one, we need to go down 1.5
Now we have our completed slope intercept form of a line: Y=3/2X -5 ½
There we go!
It would have been alot easier to do this with a graph. The only problem with this though, is that you wouldn't have known exactually where it intercepted the Y axis, you would have had to estimate...but you probably would have figured out it's about -5 ½
