Which of the following is not a property of indifference curve ?

Concave to the origin

The correct answer is option (4) : Concave to the origin

Indifference curves are graphical representations showing combinations of two goods that provide a consumer with equal levels of satisfaction. Concave to the origin is not a property of an indifference curve. Here's why the other properties hold true:

Downward sloping: This indicates that as you consume more of one good, you need to give up some of the other good to maintain the same level of satisfaction.

Convex to the origin: This reflects the diminishing marginal rate of substitution. As you consume more of one good, the additional satisfaction gained from consuming even more of it starts to decrease. This makes the curve bend outwards as it moves away from the origin.

Higher indifference curve shows higher satisfaction: Different indifference curves represent different levels of satisfaction. The farther an indifference curve is from the origin, the higher the level of satisfaction it represents.

Therefore, an indifference curve is typically downward sloping, convex to the origin, and higher indifference curves represent greater satisfaction.