straight line consumption curve from it derive saving curve
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Diagrammatic Derivation of Saving Curve from Consumption Curve!
We know that consumption + saving is always equal to Income because income is either consumed or saved.
It implies that consumption and saving curves representing consumption and saving functions are complementary curves.
Therefore, we can derive saving function or curve directly from consumption function or curve. This has been depicted in the adjoining Fig. 8.7 comprising Part-A showing consumption function and Part-B showing saving function.
In Part-A of this Figure, CC curve shows consumption function corresponding to each level of income whereas 45° line represents income. Recall that each point on 45° line is equidistant from X-axis and Y-axis. C curve intersects 45° line at point B at which BR = OR, i.e., consumption = Income. Therefore, point B is called Break-even point showing zero saving.
It emphasises that saving curve must intersect x-axis at the same income level where consumption curve and 45° line intersect. Further, it will be seen that to the left of point B, consumption function lies above 45° line showing that consumption is more than income, i.e., negative saving and to the right of point B, consumption function lies below 45° line showing positive saving.
We know that consumption + saving is always equal to Income because income is either consumed or saved.
It implies that consumption and saving curves representing consumption and saving functions are complementary curves.
Therefore, we can derive saving function or curve directly from consumption function or curve. This has been depicted in the adjoining Fig. 8.7 comprising Part-A showing consumption function and Part-B showing saving function.
In Part-A of this Figure, CC curve shows consumption function corresponding to each level of income whereas 45° line represents income. Recall that each point on 45° line is equidistant from X-axis and Y-axis. C curve intersects 45° line at point B at which BR = OR, i.e., consumption = Income. Therefore, point B is called Break-even point showing zero saving.
It emphasises that saving curve must intersect x-axis at the same income level where consumption curve and 45° line intersect. Further, it will be seen that to the left of point B, consumption function lies above 45° line showing that consumption is more than income, i.e., negative saving and to the right of point B, consumption function lies below 45° line showing positive saving.
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