When combination of two goods which a consumer derive equal satisfaction is plotted on a graph, the graph is known as

Step 1: Analyze the question The question describes a graph of combinations of two goods that give a consumer the same (equal) level of satisfaction. We need the name of that graph.

Step 2: Explain the concept In consumer theory, an indifference curve shows all the combinations of two goods that give a consumer equal satisfaction. Because the consumer gets the same satisfaction from every point on the curve, he or she is "indifferent" between the combinations.

Key features of an indifference curve:

• It slopes downward from left to right (more of one good means less of the other to keep satisfaction constant).
• It is convex to the origin, because of the diminishing marginal rate of substitution.
• Curves higher and farther from the origin represent higher satisfaction.
• Two indifference curves never intersect.

Step 3: Check each option

• A. Demand curve: shows the relationship between the price of a good and the quantity demanded. It does not show equal satisfaction.
• B. Indifference curve: shows combinations of two goods giving equal satisfaction. This matches the question.
• C. Opportunity curve: this is not the standard term. The closest idea is the production possibility curve, which shows the combinations of goods an economy can produce, or the budget line for a consumer.
• D. Utility curve: a vague term. It may relate to total or marginal utility from a single good, not combinations of two goods.
• E. Supply curve: shows the relationship between price and quantity supplied.

Step 4: Answer The correct answer is B. indifference curve.

Exam tip: Link the keywords to the term. "Equal satisfaction" and "combinations of two goods" mean indifference curve. "Budget or income limit" means budget line. "Price and quantity" means demand or supply curve.