What are two numbers that can multiply to 14 and add up to -9
2 answers:
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Answer:
Step-by-step explanation:
Previous concepts
The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.
Solution to the problem
In order to calculate the correlation coefficient we can begin doing the following table:
n x y xy x*x y*y
1 2 100 200 4 10000
2 5 88 440 25 7744
3 8 82 656 64 6724
4 6 84 504 36 7056
5 11 73 803 121 5329
6 4 94 376 16 8836
7 17 57 969 289 3249
8 10 78 780 100 6084
9 7 84 588 49 7056
And in order to calculate the correlation coefficient we can use this formula:
For our case we have this:
n=9