Author: mark_cameron
Last saved by: MHE
Company: McGraw-Hill

Lesson 1-3

Example 1 Compare Integers
Replace the      with <, >, or = to make 5     –3 a true sentence.

Since 5 is to the right of –3, 5 > –3.

Real-World EXAMPLE
Example 2 Order Integers
WEATHER     The table below shows the record low temperatures for selected states. Order these temperatures from least to greatest.

State | AZ | IL | NJ | NY | OH | PA | RI | SC | WA
Temperature (°F) | −40 | −36 | −34 | −52 | −39 | −42 | −25 | −19 | −48
Source: The World Almanac	
		
Graph each integer on a number line.
	
Write the numbers as they appear from left to right.
The temperatures –52°, –48°, –42°, –40°, –39°, –36°, –34°, –25°, and –19° are in order from least to greatest.

Example 3 Expressions with Absolute Value
Evaluate .

 = 6.	The graph of –6 is 6 units from 0.

Example 4 Expressions with Absolute Value
Evaluate .

 = 3 + 		The absolute value of 3 is 3.
	= 3 + 5		The absolute value of –5 is 5.
	= 8			Simplify.

Example 5 Expressions with Absolute Value
Evaluate 3 +  if x = −7.

3 + 	= 3 + 		Replace x with –7.
	= 3 + 7			 = 7.
	= 10			Simplify.