v 2. If the price of mustard falls and the quantity of mustard purchased by an individual decreases, then: a. 7b. Mustard is an inferior good and the substitution effect outweighs the income effect. Mustard is an inferior good and the income effect outweighs the substitution effect. Mustard is a normal good and the substitution effect outweighs the income effect. Mustard is a normal good and the income effect outweighs the substitution effect