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3- 1 Integers and Absolute Value. KEY TERMSInteger any number from a setGraph a point on the number line, draw a point on the line at its locationPositive Integer integers greater than zeroNegative Integer integers less than zeroAbsolute Value the distance a number is from zero on a n
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1. Algebra: Integers Chapter 3
2. 3- 1 Integers and Absolute Value KEY TERMS
Integer – any number from a set
Graph – a point on the number line, draw a point on the line at its location
Positive Integer – integers greater than zero
Negative Integer – integers less than zero
Absolute Value – the distance a number is from zero on a number line
3. When am I ever going to use this? The graph shows the number of yards the Bears gained or lost on the first four downs. A value of -3 represents a 3-yard loss.
1. What does the value of -2 represent?
2. On which down did they lose the most yards?
3. How can you represent a gain of 9 yards?
4. Positive & Negative numbers on a number line
5. Write Integers for Real-Life Situations Write the integer for each situation
The average temperature in Tennessee for May was 5 degrees below normal.
The average rainfall in Virginia for November was 5 inches above normal.
6. Your Turn Write the integer for each situation
6 degrees above normal
2 inches below normal
7. Represented on a number line
8. Absolute Value
Definition – the distance the number is from zero on a number line
Symbol : l l
Examples: l6l = 6 l-6l = 6
9. Evaluate Expressions Evaluate each expression.
l-4l
On the number line, the graph
of -4 is 4 units from 0.
So, l-4l = 4
l-5l – l2l
l-5l – l2l = 5 – 2 = 3
10. Homework
Page 107 – 108
4-9; 12-36 even