A meteor recently passed though the earth's atmosphere. At t=3 seconds, the meteor was moving at 525 miles per hour and at t=13 seconds, the meteor was moving at 825 miles per hour. if the velocity of the meteor increased at a constant rate, which linear model describes the meteor's velocity in v miles per hour at a time of t seconds after entering the atmosphere? (the answer is A-- WHY?) A. v=30t+435
B. v=30t=300
C. v=10t+435
D. v=10t+300