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Big Ideas Math Integrated I, 2016 View details

3. Function Notation

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Exercise 10 Page 125

To evaluate a function for a given value of the variable, substitute the value for the variable.

5, 3, and -2

Practice makes perfect

To evaluate a function for a certain value of x means that we substitute the given value for every instance of x. Let's do this for the given function when x=-2.

n(x)=-1-x+4

Substitute

x= -2

n( -2)=-1-( -2)+4

NegNeg

- (- a)=a

n(-2)=-1+2+4

AddSubTerms

Add and subtract terms

n(-2)=5

When x=-2, the function's value is 5. We will evaluate this function for x=0 and x=5 in the same way using the table below.