Suppose that the data in a scattershot are randomly located so that there is no relationship between x and y. which of the following describes this situation?
a. perfect negative correlation
b. zero correlation
c. weak positive correlation
d. perfect positive correlation
e. weak negative correlation

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters