How does the marginal propensity to save (MPS) differ from the average propensity to save (APS)?

MPS measures total savings relative to total income, while APS measures the change in savings relative to a change in income.

MPS and APS both measure total savings relative to total income.

MPS and APS both measure the change in savings relative to a change in income.

MPS measures the change in savings relative to a change in income, while APS measures total savings relative to total income.