Match each graph to the function type it represents

Match each graph to the function type it represents

Select ALL the graphs that have a domain of all real numbers

Select the even functions

Select the odd functions

The table shows the diameter of a rug and its cost.

Make the following statement true.

The best function type to model the data is ​ (a)   because the r² value is ​ (b)  

The table shows the total amount of dollars (in billions) that the United States spends on pets/pet related products.

Make the following statements true

The best function type to model the data would be ​ (a)   because the r² value is ​ (b)  

The 2nd best function type to model the data would be ​ (c)   because the r² value is ​ (d)  

The table shows the number of text messages (in billions) of text messages sent from 2006 to 2011, where x = 6 means 2006.

Make the following sentence true.

The correlation coefficient is ​ (a)   , which indicates a ​ (b)   relationship. Because the coefficient is positive, the data is ​ ​ (c)  

For a given data set, the correlation coefficient was calculated so that r = -0.16

Which choice is the best interpretation of the correlation coefficient?

​ (a)  

Bella recorded data and used her graphing calculator to find the equation for the line of best fit. She then used the correlation coefficient to determine the strength of the linear fit.

Which correlation coefficient, r, represents the strongest linear relationship? Which one the weakest?

The strongest r value is ​ ​ (a)  

The weakest r value is ​ (b)