Use the following general linear demand relation to answer questions : $$Q _ { d } = 680 - 9 P + 0.006 M - 4 P _ { R }$$ where M is income and $P _ { R }$ is the price of a related good, R.
-From this relation it is apparent that the good is:

Question

Use the following general linear demand relation to answer questions  : $$Q _ { d } = 680 - 9 P + 0.006 M - 4 P _ { R }$$ where M is income and $P _ { R }$ is the price of a related good, R.
-From this relation it is apparent that the good is:

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The Answer of Use the following general linear demand relation to answer questions  : $$Q _ { d } = 680 - 9 P + 0.006 M - 4 P _ { R }$$ where M is income and $P _ { R }$ is the price of a related good, R.
-From this relation it is apparent that the good is:

Use the Following General Linear Demand Relation to Answer Questions Qd=680−9P+0.006M−4PRQ _ { d } = 680 - 9 P + 0.006 M - 4 P _ { R }Qd​=680−9P+0.006M−4PR​

Use the Following General Linear Demand Relation to Answer Questions $Q _ { d } = 680 - 9 P + 0.006 M - 4 P _ { R }$