Ton of free points! need asap! easy math question about periodic function for math people. will give brainliest for the right answer! math genius anyone? i am really dumb for not knowing how to do this one question, lol. can someone give me the right answer and explain how to do this one? the graph (pic attached) shows the height of a tire's air valve, y, in inches, above or below the center of the tire, for a given number of seconds, x. what is the diameter of the tire?