Find the constant of proportionality k as a fraction in simplest form. Then enter an equation for the relationship between x and y. x 6 12 18 24
y 2 4 6 8

The constant of proportionality, k is equal to

The equation is y =

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