Defined Functions

Evaluating Piecewise Defined Functions

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First Ten Minutes of class

• For the first ten minutes I need you to complete the evaluating functions do now on Delta Math. Realize, if this is not turned in in ten minutes it is late.

The next few slides will be review from yesterday

Multiple Choice

Which number is in the interval

9<x<10

• 9

• 10

• 9.1

• 10.1

Multiple Choice

Which interval is 7 in?

• 5<x<6

• 3<x<10

• 7<x<12

• 4<x<7

Multiple Choice

Which interval is 3 in?

• x<2

• 2<x<3

• 3<x<4

• None of the above

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Multiple Choice

What was the graph doing on that interval?

• Increasing

• Decreasing

• Staying Constant

What is the graph doing on the interval

1

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Multiple Choice

Increasing, decreasing or constant

• increasing

• decreasing

• constant

Evaluating Piecewise Defined Functions

• To Evaluate a piecewise function, We have to determine which interval the input belongs to.

• For this one which interval does 5 belong to?

Multiple Choice

Which interval contains the number 5?

• x<2

• x=2

• x>2

• Since 5 is in the third interval, we are going to use the third function to evaluate

• f(5)=-(5)+3

• f(5)=-2

You try

• Steps:

• Identify which interval -1 is in

• Use the correct equation to evaluate.

Multiple Choice

What is the answer

• 0

• 1

• 2

• 3

Evaluate

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Multiple Choice

What is f(3)??

• -5

• 4

• 6

• 7

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Multiple Choice

what is f(-4)

• 0

• 1

• 2

• 3