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 There is decrease in price of the good presented along the OX axis
subject to condition, the price of the good presented along the
OY-axis and income of the consumer to remain constant.
The budget line rotates left ward along OX-axis, when

 There is increase in price of the good presented along the OX axis
subject to condition, the price of the good presented along the
OY-axis and income of the consumer to remain constant.

The budget line rotates down ward along OY-axis, when
 There is increase in price of the good presented along the OY axis

subject to condition, the price of the good presented along the
OX-axis and income of the consumer to remain constant.
The budget line rotates up ward along OY-axis, when

 There is decrease in price of the good presented along the OY axis
subject to condition, the price of the good presented along the
OX-axis and income of the consumer to remain constant.

Properties of budget line: -

 The budget line slope downward because of inverse relationship
between both the goods.

 The budget line is a straight line because the slope at every point
on it are equal.
 The slope of the budget line is equal to the ratio of prices of both
1
the goods presented along both the axis. i.e. −
2

 The horizontal and vertical intercept is and respectively.
1 2
Consumer’s equilibrium through I.C analysis.

Consumer equilibrium refers to a situation, in which a
consumer derives maximum satisfaction, with no intention to change it
and subject to given prices and his given income. The point of maximum
satisfaction is achieved by studying indifference map and budget line

together.