The graph shows the amount of savings over time in Eliana's account. Lana, meanwhile, puts $45 each week into her savings account. If they
both begin with $0, who is saving at the greater rate?

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.