You consume good X (horizontal axis)and good Y (vertical axis),and your indifference curves are vertical lines because you do not gain any satisfaction from consumption of Y.As the price of X declines,the change in consumption of X is entirely composed of the:

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The income effect is the change in consumption of a good due to a change in the consumer's income. In this case, the price of X declines, which means that the consumer's income increases. This will lead to an increase in the consumption of X. The substitution effect is the change in consumption of a good due to a change in the relative prices of goods. In this case, the price of X declines relative to the price of Y, which means that X is now relatively cheaper than Y. This will lead to an increase in the consumption of X. The Giffen effect is a special case of the substitution effect where the consumption of a good increases as its price increases. This is because the good is an inferior good, and consumers substitute away from other, more expensive goods as the price of the inferior good increases. The independent good effect is the change in consumption of a good due to a change in the price of another good that is not a substitute or complement. In this case, the price of Y does not change, so the independent good effect is not relevant.

You Consume Good X (Horizontal Axis)and Good Y (Vertical Axis),and