Sandra is planning to sponsor a gravity racer in an upcoming race. She has some decisions to make about which racer to choose. 1) The table and graph below show the average speeds of two gravity racers traveling down the same hill. Part A: What is the constant of proportionality for each racer? Between the two gravity racers, which would you expect to win a race? Explain. * Part B: If the weights and sizes of the Tempest and the Thunder are the same, how do their wheels compare? * 2) Sandra went to several races to watch the gravity racers in action. Each gravity racer's team had a poster claiming their racer was the best. Does the advertised speed of any of the gravity racers form a proportional relationship with the advertised speed of another gravity racer? Explain. * 3) Sandra notices a fourth racer called the Whirlwind. Its poster says it covers 7/10 mile in 1/20 hour. She wants to compare the whirlwind with the other racers. Part A: What is the Whirlwind's speed in miles per hour? * Part B: Which gravity racer do you think Sandra should sponsor? Explain. *