Market trader sells mobiles on his stall. He sells the mobiles for a different fixed price, x mobiles in each of six weeks. He notes the number of mobiles, y that he sells in each of these six weeks....

Market trader sells mobiles on his stall. He sells the mobiles for a different fixed price, x  mobiles in each of six weeks. He notes the number of mobiles,  y that he sells in each of these six weeks. The results are shown in the following table:

1. Find the coefficient of correlation and interpret it.


2. Calculate the equation of the regression line of on x y^*=a+bx


3. If he sells 8 mobiles, how many weeks he will take to sell?