Find the correlation coefficient of the data
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Goodwill sells paperback books in their stores and wanted to examine the relationship between price and demand. The price of a particular novel was adjusted each week and the weekly sales were recorded in the Excel table below.
| Sales | price |
| 3 | $ 12 |
| 4 | $ 11 |
| 6 | $ 10 |
| 10 | $ 9 |
| 8 | $ 8 |
| 10 | $ 7 |
The correlation coefficient for this data is .....
a. -0.402
b. -0. 623
c. -0.910
d. 0.197