To find the unit rate in grams per liter, you divide the total grams of sugar by the total liters of the drink.
Given:
- Total grams of sugar = 58 grams
- Total liters of drink = 2 liters
Unit rate = Total grams of sugar / Total liters of drink = 58 grams / 2 liters = 29 grams per liter.
Therefore, the correct response is 29 grams per liter.