In an area of the great plain records were kept on the relationship between rainfalll and yield of wheat. Calculate linear correlation coefficient. Round 3 decimals

Rainfallx	11.7	10	14.6	13.7	20	11.5	8.2	16.8	17.2
Yield y	54.5	50.2	62.8	63	86.4	53.2	35.9	80	82.8

A) .998

b) .900

c) .981

d) .899