Is y=5-2x a linear equation

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

Read the situations in the table below. then drag a graph and equation to represent each situation. indicate whether each of the relationships is proportional or non-proportional. edit : i got the right answer its attached

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)