The slope of an indifference curve is measured by:​

Correct option is D

​The correct answer is (d) marginal rate of substitution 

Explanation: ​The slope of an indifference curve is measured by marginal rate of substitution.

Information Booster: Here are some other things to know about indifference curves:

• Indifference curves are convex to the origin
• No two indifference curves intersect
• Consumers are more satisfied on indifference curves that are farther from the origin
• To maximize utility, a consumer will choose to consume on the highest possible IC they can afford
• The specific shape of indifference curves can be different for every person
• A set of indifference curves is called an indifference map​