Answer:

The graph in the attached figure
Step-by-step explanation:
Let
x-----> the number of pints
y----> the number of servings
For x=3 pints, y=2 servings
This is a proportional variation
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
or 
so
The linear equation is equal to

The graph in the attached figure
The circumcenter is the center of a triangle's circumcircle. It can be found as the intersection of the perpendicular bisectors.
Its c x<span> is positive, and </span>y<span> is negative.</span>