Answer:
From this, you can tell that Ana's marginal propensity to consume (MPC) is 0.80, and her marginal propensity to save (MPS) is 0.20. Mathematically, it must always be true that: Consumption = Therefore, it must also be true that: MPC = 1 - MPS.
Step-by-step explanation:
Marginal propensity to consume refers to amount that a household decides to spend of every extra dollar that they earn. Since you either spend or save money, the marginal propensity to save is the portion that you decided not to spend, and therefore, save.