1. Algebra 150 Unit: Functions Lesson Plan #8a: Negative Numbers (Reteach) Objective
SWBT add, subtract, multiply and divide negative integers (whole numbers).

2. Algebra 150 Unit: Functions Lesson Plan #8a: Negative Numbers (Reteach)
Do Now
Discuss Do Now
Video: Negative Numbers
Worksheet(s)

3. DO NOW 1 + 2 = ? 1 + (-2) = ? 1 – 2 = ? -2 + 1 = ? 1(1) = ? 1 (-1) = ?
-1 (1) = ?
1 (1) = ?
-1 (-1) = ?
1 /1 = ?
-1 /1 = ?
1/-1 = ?

4. Discussion/Practice Read the following math statement in English:
f(x) = 2 + x f(x) = 3 + x f(x) = 5x f(x) = x/2 f(x) = 3x – 25

5. Another Example
f(x) = 3x + 25 f(x) = y y = (3 times x) + 25 x = 3 y = ? y = 3(x) + 25 = 3(3) + 25 = = 34 x = 4 y = ? Y = 3(x) + 25 = 3(4) + 25 = = 37

6. Example of Completed Function Table with Calculations Shown
f(x) = 4 – x X = 4- x X y
Calculations -1 5
4 – (-1) = 4 +1 = 5 4
4 – 0 = 4 1 3
4 – 1 = 3 2
4 – 2 = 2
4 – 3 = 1

7. Resources Video web site:
Graphic: Domain and range
Work sheet (easy):
Work sheet (more complex):