Describing Roles of Variables and Constants

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PSAT Math › Describing Roles of Variables and Constants

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Hannah is selling candles for a school fundraiser all fall. She sets a goal of selling candles per month. The number of candles she has remaining for the month can be expressed at the end of each week by the equations , where is the number of candles and is the number of weeks she has sold candles this month. What is the meaning of the value in this equation?

The number of weeks that she has sold candles this month.

The number of candles she has remaining for the month.

The number of candles that she sells each week.

The number of candles that she has sold thus far that week.

Explanation

Since we know that stands for weeks, the answer has to have something to do with the weeks. This eliminates "the number of candles she has remaining for the month." Also, we can eliminate "the number of weeks that she has sold candles this month" because that would be our value for , not what we'd multiply by. The correct answer is, "the number of candles that she sells each week."

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