Linear Regression Please help with answering 9.12 a. & b., and 9.16 a. & b.

9.12. For nations listed in the Human Development Report, the correlation with percent of people using the Internet is 0.888 for per capita gross domestic product (GDP, a summary description of a nation's wealth), 0.818 for percent using cell phones, 0.669 for literacy rate, -0.551 for fertility rate ( the mean number of children per adult woman), and 0.680 for per capita emissions of carbon dioxide. (a) Explain how to interpret the sign of the corre- lation between Internet use and (i) GDP, (ii) fertility rate. Problems 291 (b) Which variable has the (i) strongest, (ii) weak- est linear association with Internet use? 9.16. For the student survey data set described in Exer- cise 1.11, the sample correlation between y = political ideology (scored 1 to 7, with higher values representing more conservatism) and x = number of times a week reading a newspaper isr = -0.066. (a) Would you conclude that the sample associa- tion is strong or weak? (b) Interpret the square of the correlation