Which of the following relations shows a function?
a.{(5, -7), (6, -7), (-8, -1), (0, -1)}
b.{(4, -1), (4, -2), (3, -1), (2, 4)}
c.{(4, 5), (3, -2), (-2, 5), (4, 7)}
d.{(1, 4), (4, 1), (1, -4), (-4, 1)}

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

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.

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32