Final answer:
The total cost of organic apples varies directly with the number of pounds purchased. The cost of 2.1 pounds of apples is $3.78.
Step-by-step explanation:
The total cost of organic apples varies directly with the number of pounds purchased.
To find the cost of 2.1 pounds of apples, multiply the cost per pound ($1.80) by the number of pounds (2.1):
Total cost = $1.80/pound ∙ 2.1 pounds = $3.78
Learn more about Variation in cost with pounds of organic apples