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Section 4-5

Writing a Function Rule. Section 4-5 . Objective: To write equations that represent functions. Problem #1: Writing a Function Rule.

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Section 4-5

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  1. Writing a Function Rule Section 4-5 Objective: To write equations that represent functions

  2. Problem #1: Writing a Function Rule a) You can estimate the temperature by counting the number of chirps of the snowy tree cricket. The outdoor temperature is about 40°F more than one fourth the number of chirps the cricket makes in one minute. What is a function rule that represents this situation?

  3. Problem #1: Writing a Function Rule b) Carolyn has 420 CDs in her collection. Each month, she adds 12 more CDs to her collection. What equation is a function rule that represents this situation.

  4. Problem #1: Writing a Function Rule c) A landfill has 50,000 tons of waste in it. Each month it accumulates an average of 420 more tons of waste. What is a function rule that represents the total amount of waste after m months?

  5. Problem #2: Writing & Evaluating a Function Rule a) A concert seating plan is shown below. Reserved seating is sold out. Total revenue from ticket sales will depend on the number of general-seating tickets sold. Write a function rule to represent this situation. What is the maximum possible total revenue?

  6. Problem #2: Writing & Evaluating a Function Rule b) A kennel charges $15 per day to board dogs. Upon arrival, each dog must have a flea bath that costs $12. Write a function rule for the total cost for n days of boarding plus a bath. How much does a 10-day stay cost?

  7. Problem #2: Writing & Evaluating a Function Rule c) An archery club charges an annual membership fee of $65 plus $2 per visit. Write a function rule for the total cost of belonging to the club if you make v visits in a year. How much would it cost if you use the club 15 times in a year?

  8. Problem #3: Writing a Nonlinear Function Rule a) Write a function rule for the area of a rectangle whose length is 5 feet more than its width. What is the area of the rectangle when its width is 9 feet?

  9. Problem #3: Writing a Nonlinear Function Rule b) Write a function rule for the area of a triangle whose height is 4 in. more than twice the length of its base. What is the area of the triangle when the length of its base is 16 in.?

  10. Problem #3: Writing a Nonlinear Function Rule c) Write a function rule for the area of a rectangle whose length is 3 in. more than the width. What is the area of the rectangle when its width is 7 in.?

  11. Homework Textbook Page 265; # 1 – 21 Odd

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