# Chapter 2 Algebra 9

## Math 9 Chapter 2 Lesson 3: Graph of the function y = ax + b (a 0)

Math 9 Chapter 2 Lesson 3: Graph of the function y = ax + b (a 0) 1. Summary of theory 1.1. Graph of the function y = ax + b (a 0) The graph of the function (y = ax + b (a neq 0)) is a straight line: -Cut the vertical axis at …

## Math 9 Chapter 2 Lesson 4: Parallel lines and intersecting lines

Math 9 Chapter 2 Lesson 4: Parallel lines and intersecting lines 1. Summary of theory 1.1. Parallel lines Let d have the equation (y=ax+b(aneq0)) and the line d’ have the equation (y=a’x+b'(a’neq0)). Then d and d’ are parallel if and only if (a=a’) and (bneq b’) Note: if a=a’ and b=b’ then d coincides with …

## Math 9 Chapter 2 Lesson 5: The slope of the line y = ax + b (a 0)

Math 9 Chapter 2 Lesson 5: The slope of the line y = ax + b (a 0) 1. Summary of theory 1.1. The concept of the slope of the line y = ax + b (a ≠ 0). Consider the line (y=ax+b (a neq 0)). Then a is called the slope of the line …

## Math 9 Chapter 2 Lesson 2: First order functions

Math 9 Chapter 2 Lesson 2: First order functions 1. Summary of theory 1.1. Define A first-order function is a function given by the formula (y = ax + b,) where (a, b) are the given numbers and (a ≠ 0.) For example, (y=-5x;y=2x+1) are first order functions. 1.2. Nature The first order function (y …