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Discrete Graphs

The number of...

Question

The number of CD's sold v/s the total cost of those many CD's is given in the above graph. The cost of one CD is

$ 4

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$ 6

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$ 8

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$ 10

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Solution

The correct option is D $$ 10$

We can see from point $A$ that the cost of one CD is $10$ dollars.

From points $B, C, D$ and $E$ we can see that the total cost is incresing by $10$ dollars each time we purchase a new CD.

Hence, the cost of each CD is $10$ dollars.

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