Find the value for the correlation coefficient r x 5,1,4,2,3, y 5,10,12,4,8?

Correlation(r) =[ NΣXY - (ΣX)(ΣY) / Sqrt([NΣX2 - (ΣX)2][NΣY2 - (ΣY)2])]
where
              N = Number of values or elements
              X = First Score
              Y = Second Score
              ΣXY = Sum of the product of first and Second Scores
              ΣX = Sum of First Scores
              ΣY = Sum of Second Scores
              ΣX2 = Sum of square First Scores
              ΣY2 = Sum of square Second Scores
so the answer is r = -0.09449.
You can go to link for more details：www.easycalculation.com.