Calculated coefficient of correlation between the price and quantity demanded.

Explanation

`r=(sumdx'dy'-((sumdx') xx(sumdy'))/(N))/(sqrt(sumdx'^(2)=((sumdx')^(2))/(N))xx sqrt(sumdy'^(2)-((sumdy')^(2))/(N)))`
`=(-10-(0)/(5))/(sqrt(10-(0)/(5))xxsqrt(10-(0)/(5)))`
`=(-10)/(sqrt(10)xxsqrt(10))=(-10)/(10)=-1`
Coefficient of Correlation (r)=-1.
This is a situation of perfectly negative correlation between price and quantity demanded.