SOLUTION: The size of a certain population of wild horses varies because of certain ecological pressures. In 1999, the number of horses was 100. In 2002, the population was down to 60, but i

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Question 1160910: The size of a certain population of wild horses varies because of certain ecological pressures. In 1999, the number of horses was 100. In 2002, the population was down to 60, but in 2005, the population was back up to 100.
a) Assume that 100 was the maximum number of horses and 60 was the minimum. Write an equation that models the size of the population of horses, in terms of what year it is, starting with 1999.
b) What is the equation of the axis of this equation, and what does it represent?
c) How many horses were there in 2000?
d) How many horses should there be in 2015?
I need steps please also
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52864) About Me  (Show Source):
You can put this solution on YOUR website!
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Answer by josgarithmetic(39627) About Me  (Show Source):
You can put this solution on YOUR website!
The description and question part "a", looking for a cosine function.