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 19 Page 65

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

Value: - 15
Ordered Pair: (9,- 15)

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=9.
f(x)=2x-33
f( 9)=2( 9)-33
f(9)=18-33
f(9)=- 15
When x=9, the function's value is - 15. The ordered pair that corresponds to this result is (9,- 15).