This problem can be represented with an equation:
![C = 1.75x + 9](https://img.qammunity.org/2019/formulas/mathematics/middle-school/hf62v6duugo4z80lea2ni8gosh3nnzdpz1.png)
C represents the total amount of juice in the container. 1.75 represents how much juice is added to the container each second. x represents the amount of seconds that elapse, and 9 represents the initial amount of juice in the container.
6 seconds elapsed, so x will equal 6. Plug this into the equation:
![1.75(6) + 9](https://img.qammunity.org/2019/formulas/mathematics/middle-school/gdx5butbi0kiykmj5jmpi90wbwsmtxduud.png)
![10.5 + 9 = 19.5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/81007pb419cb4vdak30efmibpc5dkhwgs1.png)
There will be
19.5 ounces of juice in the container after 6 seconds.