8. The table Graduation Rate and Expenditure per Student contains a subset of data published by the American Institutes for Research in 2013'. The data specify the graduation rate of ve different US. colleges and the instructional expenditure per student at each of the colleges. Use the data to answer the questions. (a) Generate the regression equation for predicting graduation rates from the expenditure per student. (b) Using the regression equation, predict the graduation rate for a school that spends $6,700 per student. (c) Use the regression equation to determine how much a school would need to spend to obtain a 100% graduation rate. _'_