Question the-le
The length, , of a white whale was when it was born and increased an average of per month for the first months after it was born. Which equation best represents this situation, where is the number of months after the whale was born and is the length, in , of the whale?
The length, y , of a white whale was 162   centimeters   cm when it
Easy-difficulty · SAT Math · Linear Functions — Graphs in slope-intercept, point-slope, standard form. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice D is correct. It's given that the length of the whale was when it was born and that its length increased an average of per month for the first months after it was born. Since represents the number of months after the whale was born, the total increase in the whale's length, in , is times , or . The length of the whale , in , can be found by adding the whale's length at birth, , to the total increase in length, . Therefore, the equation that best represents this situation is .
Choice A is incorrect and may result from conceptual errors.
Choice B is incorrect and may result from conceptual errors.
Choice C is incorrect and may result from conceptual errors.
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