As given by the question
There are given that the statement:
Joan practices table tennis for 6 hours every 2 days
Now,
According to the question, she practices 6 hours every 2 days
That means, in one day Joan will practice :
![(6)/(2)=3](https://img.qammunity.org/2023/formulas/mathematics/high-school/5xa1z4idz2kz1ew9d85dzxrsmgu1vgpr1p.png)
Then,
In the x days, she will practice:
![3x](https://img.qammunity.org/2023/formulas/mathematics/high-school/pwecq5qy70calall13bwu39h8vmos5if4b.png)
Hence, the correct option is C.