Evaluating Functions (Leaving Cert Mathematics): Flashcards

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Evaluating Functions
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Meaning of 'evaluate a function'

Calculate output for a given input

Process to evaluate a function

Substitute value & perform operations

What xx represents in a function

Placeholder for any input

If f(x)=2x+3f(x)=2x+3, find f(4)f(4)

1111

If f(x)=3x+5f(x)=3x+5, find f(a+2)f(a+2)

3a+113a+11

First step in evaluating a function

Substitute the input value for xx

Next step after substituting

Perform operations & simplify

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