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Ellie, a teacher's assistant, is grading quizzes. The function f(x)f(x) gives the number of quizzes she can grade in xx minutes.\newlineWhat does f(30)=15f(30) = 15 tell you?\newlineChoices:\newline(A) Ellie can grade 3030 quizzes in 1515 minutes.\newline(B) Ellie can grade 1515 quizzes in 3030 minutes.

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Divide numbers written in scientific notationright chevron icon

Full solution

Q. Ellie, a teacher's assistant, is grading quizzes. The function f(x)f(x) gives the number of quizzes she can grade in xx minutes.\newlineWhat does f(30)=15f(30) = 15 tell you?\newlineChoices:\newline(A) Ellie can grade 3030 quizzes in 1515 minutes.\newline(B) Ellie can grade 1515 quizzes in 3030 minutes.
  1. Interpret Function Notation: Interpret the function notation.\newlineThe function f(x)f(x) represents the number of quizzes graded in xx minutes. The notation f(30)=15f(30) = 15 means that when xx is 3030, f(x)f(x) is 1515.
  2. Understand Number Representation: Understand what the numbers represent. In the context of the function, f(30)=15f(30) = 15 means that Ellie can grade 1515 quizzes in 3030 minutes.
  3. Match Interpretation to Choices: Match the interpretation to the given choices.\newlineBased on the interpretation from Step 22, the correct choice is that Ellie can grade 1515 quizzes in 3030 minutes, which corresponds to choice (B)(B).

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