1) c) y = 500 * 2^x In year 1, x = 1 and the population is 500 * 2^1 = 1000 In year 2, this doubles to 500 * 2^2 = 500 * 4 = 2000 ans so on This model describes the population doubling every year
2) A) 3 (1/2)^x and C) (0.25)^x These numbers reduce as x increases because there is a number with an absolute value less than 1 is being raised to the power of x. They also will never totally reach zero or become negative, but will approach zero as x becomes very large.
