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In 2001, X cost $3 and sold 400 units. That same year, a related good Y cost $7 and sold 200 units. In 2002, X still cost $3 but sold only 320 units, while Y rose in price to $11 and sold only 150 units. Other things the same, and assuming that the demand for X is a linear function of the price of Y, what was the crossprice elasticity of demand for X with respect to Y in 2001? Instructions: Round your answer to 2 decimal places. If you are entering a negative number, be sure to include a negative sign (-). |:|