sat suite question viewer
Algebra
/ Linear functions
Difficulty: Easy
The population of snow leopards in a certain area can be modeled by the function P defined above, where 
is the population t years after 1990. Of the following, which is the best interpretation of the equation 
?
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Explanation
Choice C is correct. It’s given that represents the population of snow leopards t years after 1990. 
corresponds to 
and 
. It follows that corresponds to 30 years after 1990, or 2020. Thus, the best interpretation of is that the snow leopard population in this area is predicted to be 550 in the year 2020.
Choices A and B are incorrect and may result from reversing the interpretations of t and . Choice D is incorrect and may result from determining that 30 years after 1990 is 2030, not 2020.