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# When the consumption function crosses the 45 line?

## When the consumption function crosses the 45 line?

The point where the aggregate expenditure line crosses the 45-degree line will be the equilibrium for the economy. It is the only point on the aggregate expenditure line where the total amount being spent on aggregate demand equals the total level of production.

What does the 45 degree line tell us about consumption?

The 45-degree line shows all points where aggregate expenditures and output are equal. The aggregate expenditure schedule shows how total spending or aggregate expenditure increases as output or real GDP rises. The intersection of the aggregate expenditure schedule and the 45-degree line will be the equilibrium.

### When the consumption function intersects the 45 degree line households are?

9. At the point graphically at which the consumption function intersects the 45-degree reference line, the MPC must be equal to 1. 10. If the consumption function lies above the 45-degree reference line, then there must be negative saving in the economy.

Why consumption curve is 45 degree?

The reason why these diagrams have this 45-degree line is that for every point on the line, the value of whatever is being measured on the x-axis is equal to the value of whatever is being measured on the y-axis. Equilibrium national income occurs where Y = E, and this would be every point on the 45 degree line.

#### How do you calculate consumption value?

The consumption function is calculated by first multiplying the marginal propensity to consume by disposable income. The resulting product is then added to autonomous consumption to get total spending.

How do you calculate change in consumption?

To calculate the marginal propensity to consume, the change in consumption is divided by the change in income. For instance, if a person’s spending increases 90% more for each new dollar of earnings, it would be expressed as 0.9/1 = 0.9.

## What is the slope of a 45 degree line in economics?

Because the two variables are measured in the same units, the 45-degree line has a slope of one and it bisects the 90-degree angle formed by the vertical and horizontal axes.

When the C line is above the 45-degree line?

When the C line is above the 45-degree line, there is dissaving and consumption is greater than disposable income.

### What is the slope of consumption function?

For every increase in income, consumption increases by the MPC times that increase in income. Thus, the slope of the consumption function is the MPC. Second, at low levels of income, consumption is greater than income.

What is a 45 degree line called?

identity line
The line, sometimes called the 1:1 line, has a slope of 1. When the abscissa and ordinate are on the same scale, the identity line forms a 45° angle with the abscissa, and is thus also, informally, called the 45° line.

#### What happens when consumption crosses the 45 degree line?

Where the consumption line crosses the 45 degree line, Y = C. Hence savings must be zero. You can see that this is the case in the bottom diagram. To the left of this point (Y 1 ), C > Y, so saving must be negative. Dissaving is occurring. To the right of Y 1, C < Y, so saving is positive.

Which is the consumption line in the diagram?

Anyway, the other line in the diagram is the one that represents consumption in the economy at each level of income. For simplicity, we shall assume that we are dealing with a 2-sector model of the economy. Households either consume or save their income. The line starts at point ‘a’. This means that even when income is zero, consumption is ‘a’.

## Where does dissaving occur on the 45 degree diagram?

Dissaving is occurring. To the right of Y 1, C < Y, so saving is positive. Notice that since MPC + MPS =1, the gradient of the saving line is ‘1-b’ where ‘b’ is the gradient of the consumption line.

Where does equilibrium occur on the 45 degree line?

In this model, equilibrium occurs wherever the aggregate expenditure crosses the 45-degree line. The 45-degree line shows where aggregate expenditure is equal to output. This model determines the equilibrium level of real gross domestic product at whichever point aggregate expenditures are equal to total output.