The figure below shows a consumer maximizing utility at two different prices (the left panel) and the consumer's demand for good X at the same two prices of good X (the right panel) .The price of good Y is $14.When the price of X increases from point M to point N along the demand curve,the substitution effect of the price increase is ________. 
Definitions:
Substitute Goods
Products or services that can be used in place of each other, where the increase in the price of one leads to an increase in demand for the other.
Independent Goods
Products whose demand is not influenced by the price or availability of other goods.
Substitute Goods
Products or services that can be used in place of each other, serving similar needs or purposes for consumers.
Income Elasticity Coefficient
A measure that shows how much the demand for a good or service changes in response to a change in consumers' income.
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