Answer:
Cherise’s indifference curves will be straight lines. Her optimal bundle will likely consist of just 1 good.
Step-by-step explanation:
When two goods are perfect substitutes, their indifference curve is a straight line. The slope of the line is negative and it is -1, since any increase in the price of good A will result in the purchase of good B.
Indifference curves that are L-shaped result from two goods being perfect complements, not perfect substitutes.
Generally, indifference curves are convex, since the more you consume of good A will result in a higher substitution rate for good B.
Concave indifference curves are not common, since the more you consume of good A results in a lower substitution rate of good B, i.e. the more you consume of good A results in you wanting less of good B.