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Price elasticity of demands for moving points

Moving from point d to point e beside demand curve D, the price elasticity of demands of DVDs of video games at equal: (a) 0.8. (b) one. (c) 1.10. (d) 1.25. (e) 2.50

493_Price Elasticity of Demand4.png

How can I solve my Economics problem? Please suggest me the correct answer.

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