Pre Algebra Slopes and Equation of a Line

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What is the equation of a horizontal line?

An equation of the horizontal line through (a,b) is y=b. The slope of a horizontal line is 0

What is the slope-intercept form of the equation of a line?

An equation of the line that has slope m and y-intercept b is y=mx+b

What is the equation of a vertical line?

An equation of the vertical line through (a,b) is x=a. The slope of a vertical line is undefined.

What is the slope of a line

Slope = Rise/Run

How do we use slope as a rate of change?

When a line is used to model the relationship between two quantities, the slope of the line is the rate of change of one quantity with respect to the other.


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