To find the unit rate for 1 bag of chips, we start with the information that 5 bags cost $6.25. We can calculate the cost of 1 bag by dividing the total cost by the number of bags:
\[ \text{Cost of 1 bag} = \frac{\text{Total cost}}{\text{Number of bags}} = \frac{6.25}{5} \]
Now, perform the division:
\[ \frac{6.25}{5} = 1.25 \]
Therefore, the cost of 1 bag of chips is $1.25.
So the answer is: © $1.25