The ratio of the total increment in equilibrium value of final goods output to the initial increment in autonomous expenditure is called ______.

Investment multiplier.

The correct answer is Option (2) → Investment multiplier.

The ratio of the total increment in equilibrium value of final goods output to the initial increment in autonomous expenditure is called the investment multiplier of the economy.

Investment multiplier = ∆ Y / ∆ $\bar A$ = 1 / (1- c)