Finding the equation of a line through two points

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Taught by Naomi1431

Currently 4.0/5 Stars.

9272 views | 1 rating

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Part of video series

Previous | Writing Equations for Lines

Meets NCTM Standards:

2a
2b
2c
2d

Lesson Summary:

In this lesson, Naomi teaches how to find the equation of a line when given two points. The first step is to find the slope of the equation using the slope formula. Then, using either one of the points with the slope, we can plug them into the point slope formula to get an equation for the line. Naomi provides an example of a problem containing fractions and simplifies the expression to get the slope. Finally, she uses the point slope formula with the second point to find the final equation.

Lesson Description:

This is an example of how to find the equation of a line through two points, when the two points contain fractions, with the point slope formula.

Questions answered by this video:

How do you write the equation of a line that goes through 2 given points?
How do you write the equation of a line containing (1/6, -1/3) and (5/6, 5)?
What is the slope formula?
How do you use the slope formula to find the slope between two points?
How can you use the point-slope formula to write an equation if you have a point and a slope?
How do you convert an equation in point-slope form into slope-intercept form?

Staff Review
- Currently 4.0/5 Stars.
This lesson explains one example problem of how to write the equation of a line that goes through two given points. First, the slope between the two points is found with the slope formula. Then, the points-slope formula is used to write the equation for the line. All steps involved in the process are explained and written out.

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