To find the number of calories in 1 ounce of soda, we can use the points from the graph you provided. The points (3, 36) indicate that 3 ounces of soda contain 36 calories.
To determine the calories per ounce, we can divide the number of calories by the number of ounces:
\[ \text{Calories per ounce} = \frac{36 \text{ calories}}{3 \text{ ounces}} = 12 \text{ calories per ounce} \]
Thus, there are 12 calories in 1 ounce of soda.