Question

A 2-column table with 4 rows. The first column is labeled x with entries 0, 5, 10, 15. The second column is labeled y with entries 15, 10, 5, 0.
What is the correlation coefficient for the data shown in the table?

1
-1
5
10

Answer 1

-1

The points lie exactly on the line y = 15 − x, so the correlation is a perfect negative linear relationship (r = -1).