I'll break it down for you. Here are the main points:
-has 2 large servings
-made from 9 pints
-x represents how many pints
-y represents how many servings
Now that we know this we can find what each serving comes out to be for example:
=4.5 or 4
So for each serving it will come out to be 4.5 pints.
Now that we know this we can figure out the slope to find what the equation which is for example the slope for this equation would be rise over run for example:
=
=
when simplified.
So our equation would be (also the answer) y=x
Hope this helps my dude ^^ If you have more questions go ahead and ask.