Two variables are always sometimes I never) correlated.

4. In the U. S., from 2004 - 2015, the correlation coefficient for the relationship

between the size of a cell phone data plan, x, and the number of text

messages sent, y, is r = +0.97. Describe the relationship between the data

plan size and the number of text messages sent in the U. S.

There is strong positive correlation between the size of a cell phone data plan and the number of text messages sent in the U.S.

Step-by-step explanation:

The correlation coefficient is a statistical degree that computes the strength of the linear relationship amid the relative movements of the two variables (i.e. dependent and independent). The correlation coefficient  value ranges from -1 to +1.

Positive correlation is an association amid two variables in which both variables change in the same direction.  

A positive correlation occurs when one variable declines as the other variable declines, or one variable escalates while the other escalates.

The closer the the correlation coefficient value gets to +1 or -1, the stronger relation becomes.

The correlation coefficient for the relationship  between the size of a cell phone data plan, x, and the number of text messages sent, y, is:

r = +0.97

The correlation coefficient is closer to +1.

Thus, there is strong positive correlation between the size of a cell phone data plan and the number of text messages sent in the U.S.

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two