SAT数学备考中，OG内容也是大家复习的重要资料。对于OG中出现的数学题目，也是大家参考练习的重点。本身这些考试题目就有一定的代表性，大家除了练习之外，还要参考相关的答案解析。下面小编为大家整理了详细的内容，供大家参考!

A biology class at Central High School predicted that a local population of

animals will double in size every 12 years. The population at the beginning

of 2014 was estimated to be 50 animals. If P represents the population n

years after 2014, then which of the following equations represents the

class's model of the population over time?

Key D

Objective: You must identify the correct mathematical notation for an expo-

nential relationship that represents a real-world situation.

Explanation: Choice D is correct. You first recognize that a population that

doubles in size over equal time periods is increasing at an exponential rate.

In a doubling scenario, an exponential growth model can be written in the

form y = a where a is the initial population (that is, the population when

n = 0) and b is the number of years it takes for the population to double in

size. In this case, the initial population is 50, the number of animals at the

beginning of 2014. Therefore, a = 50. The text explains that the population

will double in size every 12 years. Therefore, b = 12.

以上就是关于“新SAT数学OG题目解析”的内容，希望通过上述内容的学习，大家对于SAT数学OG真题内容有更好的了解，做好相关的备考。

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