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Big Ideas Math Integrated I, 2016 View details

3. Function Notation

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Exercise 8 Page 125

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

19, 18, and 15.5

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.

b(x)=18-0.5x

Substitute

x= -2

b( -2)=18-0.5( -2)

MultNegNegOnePar

- a(- b)=a* b

b(-2)=18+0.5 * 2

Multiply

b(-2)=18+1

AddTerms

Add terms

b(-2)=19