Im having trouble with geometry, its not in book its on paper instead and im struggling to understand

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.

Which compound inequality could be represented by the graph?

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585