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linear equation

A linear equation in two variables describes a relationship in which the value of one of the variables depends on the value of the other variable.


x is the independent variable and y depends on it.


We call y the dependent variable.

Important to remember about lines

Not every point on the line that the equation describes will necessarily be a solution to the problem that the equation describes.


any two points determine a line

graphing a line

Find two pairs of values and draw a line through the points they describe. Must graph as a straight line.


the line on a graph that is horizontal/ side to side


the line on a graph that is vertical/up and down


the letter in a equation

slope form


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