Writing Linear Equations | MathHelp.com - Free Educational videos for Students in K-12 | Lumos Learning

Writing Linear Equations | MathHelp.com - Free Educational videos for Students in k-12


Writing Linear Equations | MathHelp.com - By MathHelp.com



Transcript
00:00 in this example , we're asked to write the equation
00:04 of the given line in slope intercept form . Remember
00:09 that slope intercept form is the same thing as Y
00:14 equals mx plus B form . Yeah , where M
00:22 represents the slope of the line . Mhm . Yeah
00:27 . And B represents the Y intercept . Yeah .
00:36 So our first step is to find the slope and
00:40 why intercept of the given line to find the slope
00:45 . Remember that we use the ratio rise over run
00:49 between any two points on the line . Yeah .
00:57 And notice that to get from point A to point
01:00 B . Along this line We rise one unit And
01:07 Run two units . Yeah . So our slope or
01:15 rise over run Is 1/2 . Yeah . Next to
01:27 find the Y intercept , remember that the y intercept
01:31 is the point where the line crosses the y axis
01:36 and notice that our line crosses the Y axis at
01:40 the 0.3 Which means that the Y intercept is three
01:52 . Therefore M equals 1/2 And B equals three .
01:59 And we substitute these values into our formula for M
02:04 and B . To get y equals 1/2 x plus
02:09 three . Yes . Mhm . So the equation of
02:21 the given line in slope intercept form is Y equals
02:27 one half X plus three .
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