A scatterplot of the relationship between the cost of tuition at a typical four-year private college versus year (from 1976 through 2010) displayed a nonlinear relationship. A least-squares regression analysis of ln(cost of tuition) versus year was conducted to determine if the relationship between year and cost can be described by an exponential relationship. The analysis produced the following residual plot. Based upon the residual plot, is an exponential model appropriate for modeling these data? a. Yes, the residual plot clearly displays an exponential curve. b. Yes, the residual plot clearly displays random scatter about the line residual = 0. c. No, the residual plot does not display random scatter about the line residual = 0. d. No, the residual plot shows us that a quadratic model is appropriate for these data. e. No, the residual plot shows us that a linear model is appropriate for these data