To find the amount of money Ava still needs to save (denoted as \( x \)) to reach her goal of at least $200, we start with her current savings of $75.
The equation for her total savings is:
\[ x + 75 \geq 200 \]
This indicates that the amount she still needs to save (\( x \)) plus her current savings ($75) must be at least $200.
Thus, the correct inequality is:
\( x + 75 \geq 200 \).