PLEASE HELP!! Determine whether y varies directly with x. If so, find the constant of variation k and write equation.
X 3, 12, 48, 192
Y 21, 84, 336, 1344
A. yes; k=7;y=7x
B. yes; k=4;y=4x
C. yes; k = 3 ; y = 3x
D. no

Can someone check my answer? you

Write an equation of a line in slope intercept form that is perpendicular to the line 2x -3y = 12 and passes through the point (2, 6).

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.