An article gave a scatter plot along with the least squares line of x = rainfall volume (m) and y = runoff volume (m) for a particular location. The accompanying values were read from the plot. x 8 12 14 18 23 30 40 46 55 67 72 79 96 112 127 y 4 10 13 14 15 25 27 44 38 46 53 77 82 99 104 in USE SALT (a) Does a scatter plot of the data support the use of the simple linear regression model? Yes, the scatterplot shows a reasonable linear relationship. O Yes, the scatterplot shows a random scattering with no pattern. O No, the scatterplot shows a reasonable linear relationship. No, the scatterplot shows a random scattering with no pattern. (b) Calculate point estimates of the slope and intercept of the population regression line. (Round your answers to four decimal places.) slope 8190 intercept |-.7283 (c) Calculate a point estimate of the true average runoff volume when rainfall volume is 49. (Round your answer to four decimal places.) 44.3167 x m (d) Calculate a point estimate of the standard deviation o. (Round your answer to two decimal places.) 5.44 1x m (e) What proportion of the observed variation in runoff volume can 9742 attributed to the simple linear regression relationship between runoff and rainfall? (Round your answer to four decimal places.)