To find the unit rate for 1 bag of chips, we first need to find the cost of one bag based on the information provided.
You have 5 bags costing $6.25.
To find the cost of 1 bag, you can divide the total cost by the number of bags:
\[ \text{Cost per bag} = \frac{\text{Total Cost}}{\text{Number of Bags}} = \frac{6.25}{5} \]
Now, calculate that:
\[ \frac{6.25}{5} = 1.25 \]
Therefore, the cost of 1 bag of chips is $1.25.
The correct answer is $1.25.