To determine the unit rate for 1 bag of chips, we can start with the cost of 5 bags, which is $6.25.
To find the cost of 1 bag, we divide the total cost by the number of bags:
\[ \text{Cost per bag} = \frac{\text{Total Cost}}{\text{Number of Bags}} = \frac{6.25}{5} = 1.25 \]
Thus, the unit rate for 1 bag of chips is $1.25.
The correct response is:
$1.25