Algebra I: Calculating equation of a line from two points
This is a free lesson from our course in Algebra I
 
   
In this lesson we take a look at how to write the equation of a line passing through two given points. It also explains and graphs the equations of coordinate axes and equations of lines parallel to the coordinate axes. Generally speaking, the equation of a line parallel to x-axis is y = a, and that of a line parallel to y-axis is x = b.
Equation of a line passing through the points A(x1 , y1) and B(x2 , y2) is :
(x - x1) (y2 - y1) = (y - y1) (x2 - x1)
where (x1 , y1) are coordinates of point A and (x2 , y2) are the coordinates of point B.
<h2>Algebra I - Calculating equation of a line from two points</h2> <p>equation, finding, line, points, slope, two points, calculating, y intercept, passing through, parallel to, intercepts, x axis, online math, coordinate, axes, y axis, to parallel, example, practice questions, slope intercept, quizzes</p> <p>The equation of a line parallel to x-axis is y = a, and that of a line parallel to y-axis is x = b.</p>
Other useful lessons:
Calculating equation of a line from point and slope
Calculating equation of a line from slope and intercept
Calculating equation of a line from point and intercept
Determine whether a point lies on a line
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