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

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

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 = ?

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

Another Example f(x) = 3x + 25 f(x) = y y = (3 times x) + 25 x = 3 y = ? y = 3(x) + 25 = 3(3) + 25 = 9 + 25 = 34 x = 4 y = ? Y = 3(x) + 25 = 3(4) + 25 = 12 + 25 = 37

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

Resources Video web site: http://mathantics.com/section/lesson-video/what-are-functions Graphic: Domain and range Work sheet (easy): https://www.slps.org/cms/lib/MO01001157/Centricity/Domain/8698/Algebra%20-%20Functions%20-%20Function%20Table%20-Easy.pdf Work sheet (more complex): https://www.slps.org/cms/lib/MO01001157/Centricity/Domain/8698/Algebra%20-%20Functions%20-%20Function%20Table%20-Harder.pdf