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Mathematics 21 Online
OpenStudy (anonymous):

How do I put something in standard form

OpenStudy (anonymous):

The points are ( 2, -5) and ( -1, 0)

OpenStudy (anonymous):

isn't that slope intercept form?

OpenStudy (aum):

y = mx + b is the slope-intercept form. The standard form is: Ax + By = C

OpenStudy (anonymous):

what do I plug in where? @aum

OpenStudy (aum):

First find the equation of the line in slope-intercept form: y = mx + b Then rearrange it to mx - y = -b to put it in standard form. First find slope: m = (y2-y1)/(x2-x1).

OpenStudy (anonymous):

Its going to be 5/-3

OpenStudy (aum):

yes, m = -5/3 y = -5/3x + b that passes through ( -1, 0) put x = -1, y = 0 and find b.

OpenStudy (anonymous):

b is going to be -2

OpenStudy (aum):

y = -5/3x + b that passes through ( -1, 0) put x = -1, y = 0 and find b. 0 = -5/3(-1) + b 0 = +5/3 + b b = -5/3

OpenStudy (aum):

y = -5/3x - 5/3 multiply by 3: 3y = -5x - 5 add 5x: 5x + 3y =-5

OpenStudy (anonymous):

wait what are you doing

OpenStudy (aum):

Putting it in standard form: Ax + By = C

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