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А ВC D0 2 4 68 10 12Which point best represents V15?-0,1)A)point AB)point Bpoint CD)point D

User Hafenkranich
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1 Answer

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We have to select a point that is the best representative of the square root of 15.

We can calculate the square root of 15 with a calculator, but we can aproximate with the following reasoning.

We know that 15 is the product of 3 and 5. If we average them, we have 4.

If we multiply 4 by 4, we get 16, that is a little higher than 15.

If we go to the previous number (3) and calculate 3 by 3 we get 9, that is far from 15 than 16.

So we can conclude that the square root of 15 is a number a little less than 4.

In the graph, the point B is the one that satisfy our conclusion, as it is a point in the scale that is between 3 and 4, and closer to 4.

The answer is Point B

User Nikhil Yadav
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