4.7 – writing functions Textbook pg. 262 Objective:

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4.7 – writing functions Textbook pg. 262 Objective: The student will write equations that represent functions in order to write a function rule.

Dependent variable (y) depends on the independent variable (x) Identify the dependent & independent: More electricity is used when the temperature goes up The cost of shipping a package is based on the weight

Writing Functions: Identify independent and dependent Choose variables for function notation Write equation from scenario 3) A lawyer’s fee is $200 per hour 4) The admission fee to a carnival is $8 and each ride costs $1.50

5) You can estimate the outside temperature (t) by counting the number of chirps (c) from a cricket. The temperature is 40 degrees more than one-fourth of the number of chirps. 6) A landfill has 50,000 tons of waste and accumulates 420 more tons every month. Write a function rule. How much waste will be in the landfill after 4 months? How many months will it take for their to be 52520 tons?

Name Date Period 4.7 – pg. 265 #9-16