Answer:
The equation is

Explanation:
Let
b -----> the number of bottles of water
w ----> the total volume of water in fluid ounces
we know that
To find out the total volume of water , multiply the volume of one bottle by the number of bottles
Each bottle of water hold 17 fluid ounces
so

This equation represent a direct variation
where
The constant of proportionality or slope is equal to
