I am very confused on these practice problems

The correlation between X and Y is r = 0.17. If we add 10 to each X value, divide each Y value by 2, and interchange the X and Y variables, the new correlation is type your answer...An agriculture research rm is testing a new type of technique for growing plants. They keep track of the number of seeds in each plot and the number of healthy plants that grow for the plot. The data is given in the table. #of seeds EEEEW l#of healthy plants |23 l19 l22 |20 |19 One particular plot had 22 healthy plants and a residual of 2.684. How many seeds were planted in that plot? HINT: the answer is NOT 53 from the given EXPLAIN YOUR PROCEDURE