Teresa is riding in a bike race that goes through a valley and a nearby mountain range.The table gives the altitude (in feet above sea level) for the five checkpoints in the race.Use the table to answer the questions.Checkpoint,Altitude(feet above sea level)1, -1152, 2,1663, 1,1854, -1685, -32(a)The top of a hill rises 530 feet above Checkpoint 4.What is the altitude of the top of the hill?(b)How much lower is Checkpoint 4 than Checkpoint 1?
