1. First graph the following equations in Desmos. Then answer the question below: Which relation is not a function?

1) (x - 2)² + y2 = 4

2) x² + 4x + y = 4

3) x+y = 4

4) xy = 4

Which compound inequality could be represented by the graph?

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

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