The file Internet contains data about Internet users and Facebook users as of December 31, 2017, based on a sample of 40 Asian and African countries. Suppose you want to develop a simple linear regression model to predict the number of Facebook users based on the number of Internet users of a country (both measured in million persons).

a. Construct a scatter plot.

b. Use the least-squares method to determine the regression coefficients b0 and b1.

c. Interpret the meaning of b0 and b1 in this problem.

d. Predict the mean number of Facebook users of a country that has 20.5 million Internet users.

e. What would you conclude about the relationship between the number of Internet users and that of Facebook users in the countries?