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Pearson Algebra 2 Common Core, 2011

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Pearson Algebra 2 Common Core, 2011 View details

1. Relations and Functions

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Exercise 21 Page 65

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

Value: - 2
Ordered Pair: (3,- 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=3.

f(x)=7/3x-9

x= 3

f( 3)=7/3( 3)-9

FracMultDenomToNumber

a/3* 3 = a

f(3)=7-9

Subtract term

f(3)=- 2

When x=3, the function's value is - 2. The ordered pair that corresponds to this result is (3,- 2).

Subchapter links

Lesson Check p.64

Practice and Problem-Solving Exercises p.65-67

Standardized Test Prep p.67

Mixed Review p.67