Farmer Jack is a watermelon farmer. If Jack plants no seeds on his farm, he gets no harvest. If he plants 1 bag of seeds, he gets 30 watermelons. If he plants 2 bags of seeds, he gets 50 watermelons. If he plants 3 bags of seeds he gets 60 watermelons. A bag of seeds costs $100, and the costs of seeds are his only costs. What is the shape of Farmer Jack's marginal cost curve?A. Constant. B. Upward sloping. C. Downward sloping. D. U-shaped.

B. Upward sloping

Explanation:

Based on the information provided within the question it can be said that the shape of Farmer Jack's marginal cost curve is an upward-sloping curve. This is a type of demand curve that illustrates a direct relationship between price of a product and the quantity that is in demand. Meaning that the more demand that exists for Jack's watermelons the higher the price will be.

the amount of money you earn by working is your income.

the percentage of people actively looking for a job is called unemployment.