An indifference curve must slope downward towards the right. is positively sloped. may be upsloping or downsloping, depending on whether the two products are complements or substitutes. is upsloping and is concave to the origin.

must slope downward towards the right.

Explanation:

The indifference curve is the curve representing the combination of two products which derives similar satisfaction and the utility which makes the customer distinct.  

The properties of the indifference curves are as follows:

1. It slopes downwards towards the right

2. It never be intersected to each other

3. It is convex to the origin

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