The diagram illustrates a consumption function. When income rises, what happens to the average propensity to save and the marginal propensity to save?
- Aaverage propensity to save: decreases; marginal propensity to save: decreases
- Baverage propensity to save: decreases; marginal propensity to save: increases
- Caverage propensity to save: increases; marginal propensity to save: decreases
- Daverage propensity to save: increases; marginal propensity to save: increases