If a consumer’s marginal rate of substitution equals 2 eggs for 1 hamburger then:

► The consumer’s indifference curve must be positively sloped.

► The consumer’s indifference curve must be convex with respect to

the origin of the graph.

► The ratio of the consumer’s marginal utility of 1 egg to that

of 1 hamburger must equal ½.

► All of the given options.