Select all of the situations that could be modeled by a linear equation. a: the barton family is driving at a rate of 62 miles per hour. b: mr. dominguez invested $1000. this money is growing at a rate of 4% per year. c: a tree was 10 feet tall when purchased. it is growing at a rate of 2 feet per year. d: time dropped a coin off a bridge. it is falling at a rate of 9.8 meters per second squared. e: the amount of people in a stadium is decreasing at a rate of 45% every 10 minutes.