Answer:
.d amount by which consumption increases when disposable income increases by $1.
Explanation:
The marginal propensity to consume is measured by measuring what proportion of a $1 increase in income is spend on consumption, so if the marginal propensity to consume is 0.85 it means that when income increases by $1 consumption will increase by $0.85 as (0.85*1)= 0.85