A study determines that people spend $1000 per year, plus $0.75 for every dollar of their income. Write the functional relationship as a formula. Determine which variable is dependent, and which is independent.
1000 dollars are being spent every year irrespective of the income which means this is the autonomous consumption. Besides there is induced consumption which is 75% of each dollar earned. this is the marginal propensity to consume which indicates that whenever income is increased by $1 75% of this income will be spent
Consumption function is therefore C = 1000 + 0.75Y
The independent variable in this case is income (Y) and the dependent variable is C. This is because Y can take any values from zero to infinity but the value of C depends upon the value of independent variable Y.
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