Forecasting

Can you pls explain a lil bit about correlation coefficient ? . They say : + 1 means the variable are positive , -1 means negative ”

+ 1 means bigger than 1 and -1 mean smaller than 1 ?

1- Can you please explain why the answer is +1,2 in this question ?

Which of the following is NOT a feasible value for the correlation coefficient ?

A +1,2
B +0,6
C 0
D -0,9

2- The following four data pairs have been obtained : ( 1,5 ) , (2,6 ) , ( 4,9 ) , ( 5,11 ). without carrying out any calculation , which of the following correlation coefficient best describes the relationship between x and y ?

A -0,98
B -0,25
C 0,98
D 0,25

The answer shows 0,98 because ” its strong and positive ” . I completely don’t understand why its strong and positive here ?

3- There is a part of ” summarizing and analyzing data ” in BPP practice , for solving it , which chapter should I watch from your lecturers ?

Thanks , Mr John