To determine the unit rate for 1 bag of chips, we can start by calculating the cost of one bag based on the information given.
We know that 5 bags of chips cost $6.25. To find the cost of one bag, we can divide the total cost by the number of bags:
\[ \text{Cost per bag} = \frac{\text{Total Cost}}{\text{Number of Bags}} = \frac{6.25}{5} \]
Calculating that:
\[ \text{Cost per bag} = \frac{6.25}{5} = 1.25 \]
So, the unit rate for 1 bag of chips is $1.25.