To determine the minimum number of weeks \( w \) Sophie needs to work in order to afford the bicycle, we can set up the inequality based on her savings and income.
- She starts with $400 saved.
- She earns $160 each week, which means in \( w \) weeks she will earn \( 160w \).
- The total amount she will have after \( w \) weeks will be her initial savings plus her earnings:
\[ 400 + 160w \]
- This total needs to be at least $1,200 in order for her to afford the bicycle:
\[ 400 + 160w \geq 1200 \]
Therefore, the correct inequality that represents the minimum number of weeks she needs to work is:
400 + 160w ≥ 1200
So, the correct response is: 400 + 160w ≥ 1200 (400 plus 160 w is greater than or equal to 1200).