Answer:
The equation is
![w=17b](https://img.qammunity.org/2020/formulas/mathematics/high-school/wrpr9sgikays86ga3neenq3lc3slrrfk6u.png)
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
![w=17b](https://img.qammunity.org/2020/formulas/mathematics/high-school/wrpr9sgikays86ga3neenq3lc3slrrfk6u.png)
This equation represent a direct variation
where
The constant of proportionality or slope is equal to
![k=17(fluid\ ounces)/(bottle)](https://img.qammunity.org/2020/formulas/mathematics/high-school/yk67270ifikullw8ns1hkwoh1xl3a2oqph.png)