Guidelines for making predictions:

• Substitute values into the function.
• Evaluate the validity of the solution.

Example: The function t = s 20 + 10 is used to calculate the number of teachers, t, needed for a given number of students, s. Find the best prediction for a school with 1650 students based upon this function?

Substitute 1650 for s in the given function: Move the values into the correct locations.

Evaluate the validity of the solution:

Click on "Check Your Answers" to verify the correct answer.

• Is it possible to hire 92.5 teachers? Interactive popup. Assistance may be required.

  Check Your Answer

  No. It is not possible to hire half a teacher.
• The best prediction is to hire ____ teachers. Interactive popup. Assistance may be required.

  Check Your Answer

  93

Example: If 64 teachers are hired, how many students are expected to enroll?

Substitute 64 for t in the given function: Move the values into the correct location.

Evaluate the validity of the solution:

• Is 1080 students a reasonable number of students in a school? Interactive popup. Assistance may be required.

  Check Your Answer

  Yes
• The best prediction is to hire ____ teachers for ____ students. Interactive popup. Assistance may be required.

  Check Your Answer

  64; 1080

When making predictions:

• Substitute values into the function.
• Evaluate the validity of the solution.