Which statement correctly describes the relationship between the graph of f(x) and the graph of g(x)=f(x)−4 ?

the graph of g(x) is the graph of f(x) translated 4 units up.

the graph of g(x) is the graph of f(x) translated 4 units down.

the graph of g(x) is the graph of f(x) translated 4 units right.

the graph of g(x) is the graph of f(x) translated 4 units left.

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

Can someone pls ! pls answer all. no explanation needed..

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