How do you find the run between two points? Can the rise be negative? Explain

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

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.

27/9=18/x a. x=9 b. x=18 c. x=6 d.x=3