Several linear models are used to describe the relationship for the data in a scatter plot. For each linear model, the correlation coefficient is found. Which correlation coefficient corresponds to the strongest linear model for the data? − 0.98 negative 0 point 9 8 − 0.45 negative 0 point 4 5 0.62 0 point 6 2 0.84

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