# Introduction to linear equations

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##### Intros
###### Lessons
1. What is a linear equation?
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##### Examples
###### Lessons
1. Which of the following is a linear equation?
i)
x = 4
ii)
y = 2
iii)y = 3x + 5
1. Graph the linear equations:
1. y = -${3 \over 4}$x + 2
2. y = ${4 \over 5}$x$-2$
3. ${3 \over 4}x + 0.6y =3$
###### Topic Notes
This is a lesson that teaches how to determine if an expression is a linear equation; and how to graph a linear equation.
Expression: A collection of numbers, variables, and signs, such as $3, 3x+4, 5 x^2 + 2, \sqrt{x-3},$etc

Equations: A mathematical statement with an equal sign, such as $y = 2, y = 3x-2, y = x, x = 3,$etc

Linear
Equation
: Ax + By = C (A, B & C are constants; x & y are variables)
All linear equations are functions except a vertical line such as x = 3.