De los siguientes conjuntos de pares ordenados indica si forma parte, o no, de una función. A) {(2,10),(8,9),(9,8),(10,2)} B) {33,1),(28,99),(33;8),(0,4)} C) {5/10,2/10),(5/6,2/4),(7/8,5/6),((9 /2,2/10)}

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.