1. if robert has $45 and has decided to double that amount every month, how much money will he have after 16 months? robert’s earnings can be described by the function y = 45 * 2x. (put that function into your calculator, graph and go to table and find when x = 16 months).
show all your work .

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.