Write an equation that represents a graphed linear function

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

For the feasibility region shown below find the maximum value of the function p=3x+2y

|p| > 3 {-3, 3} {p|-3 < p < 3} {p|p < -3 or p > 3}