PLSSS HELP IF YOU TURLY KNOW THISS

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Abilliard ball is struck by a cue. it travels 1 0 0 cm 100cm before ricocheting off a rail and traveling another 1 2 0 cm 120cm into a corner pocket. the angle between the path as the ball approaches the rail and the path after it strikes the rail is 4 5 ∘ 45 ∘ . how far is the corner pocket from where the cue initially struck the ball? do not round during your calculations. round your final answer to the nearest centimeter.

For which rational expression is -2 an excluded value of x