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the Standard deviation of the crop was 2 ton.

the Income (Y) from the Tomato Depends on the crop (X)

according to following connection Y=3X-2 the Variance Income from the Tomato in this Sampled is 4?

if i know that the Standard deviation is 2 so i just need to do 2^2 to get the Variance yes?

and 1 more Question: the Value of Pearson product-moment correlation coefficient between the crop and the Income is?

how i can solve it?

thanks for help.