Combination of Functions

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# Combination of Functions - PowerPoint PPT Presentation

Combination of Functions. Lesson 8.3. Functions to Combine. Enter these functions into your calculator. Combining Functions. Consider the following expressions Predict what will be the result if you graph. Combining Functions. Turn off the two original functions (F4)

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## Combination of Functions

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### Combination of Functions

Lesson 8.3

Functions to Combine
• Enter these functions into your calculator
Combining Functions
• Consider the following expressions
• Predict what will be the result if you graph
Combining Functions
• Turn off the two original functions (F4)
• Use them in theexpression for thecombined function
• How does this differ from a parabola?
Application
• Given two functions having to do with population
• P(x) is the number of people
• S(x) is the number of people who can be supplied with resources such as food, utilities, etc.
• Graph these two functions
• Window at 0 < x < 100 and 0 < y < 1000
Population and Supply
• Viewing the two functions
• Population
• Supply
• What is the significance of S(x) – P(x)
• What does it look like – graph it
Population and Supply
• What does it mean?
• When should we be concerned?
Population and Supply
• Per capita food supply could be a quotient
• When would we be concerned on this formula?Set window-5 < y < 5
Combinations Using Tables
• Determine the requested combinations
Descriptive Functions
• Let f(t) = number of males, g(t) = number of females in Canada in year t
• Let h(t) = average income of females in Canada in year t
• What is the formula for p(t)
• The number of people in Canada in year t
• What is the formula for m(t)
• The total amount of money earned by Canadian females in year t
Simplifying Formulas
• Given functions
• Write simplified formulas for
• f(x) = u(x) + v(x)
• k(x) = v(x)2
• h(x)=2u(x) – 3v(x)
Assignment
• Lesson 8.3
• Page 379
• Exercises 1 – 41 EOO