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$?$Using regression analysis on data from a field experiment, the demand curve for a product is estimated to be

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$=$

$1$

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$2$

$0$

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$$Is demand elastic or inelastic at this price? What would happen to the firm

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s revenue if it decided to charge a price below $

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$?$What is the cross$-$price elasticity of demand between good X and good Z when Px $=$ $$140?$ Are goods X and Z substitutes or complements?

Baye, Michael. Managerial Economics & Business Strategy $($p$.287).$ McGraw$-$Hill Higher Education. Kindle Edition.