Haley C.

Harvard student with 10 years tutoring experience!

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SAT

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Question:

The mean number of students per classroom, y, at Central High School can be estimated using the equation y = 0.8636 x + 27.227 comma where x represents the number of years since 2004 and x less or equal than 10. Which of the following statements is the best interpretation of the number 0.8636 in the context of this problem?

Haley C.

Answer:

Think of that number like the slope, or the rate of change. Because it is a positive number, it must represent the rate of increase in the number of students. Therefore, the number 0.8636 represents the estimated yearly increase in the mean number of students per classroom.

Writing

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Question:

Find the error in the following sentence: He saw a moose riding a motorcycle through the woods.

Haley C.

Answer:

The pronoun use here is unclear! It seems like the moose is riding the motorcycle through the woods, not the man. Here is the correction I would make: While riding a motorcycle through the woods, he saw a moose.

Algebra

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Question:

Find the equation of a line that passes through the points (2,-1) and (5,-7).

Haley C.

Answer:

y = --2x + 3

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