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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

3. Function Notation

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Exercise 3 Page 125

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

4, 6, and 11

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.

f(x)= x+6

x= -2

f( -2)= -2+6

Add terms

f(-2)=4

When x=-2, the function's value is 4. We will evaluate this function for x=0 and x=5 in the same way using the table below.

x	x+6	f(x)
-2	-2+6	4
0	0+6	6
5	5+6	11

Subchapter links

Communicate Your Answer p.121

Monitoring Progress p.122-124

Exercises p.125-126