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How can you find the standard form of an equation using 2 given points?
 one year ago
 one year ago
How can you find the standard form of an equation using 2 given points?
 one year ago
 one year ago

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geoffbBest ResponseYou've already chosen the best response.1
Calculate your slope and the y intercept.
 one year ago

geoffbBest ResponseYou've already chosen the best response.1
If A is at \((x_{A}, y_{A})\) and B is at \((x_{B}, y_{B})\), then slope is \(\large \frac{y_{B}  y_{A}}{x_{B}  x_{A}}\)
 one year ago

DogLuverSarah2012Best ResponseYou've already chosen the best response.0
Ok so what do I do once I have the slope?
 one year ago

geoffbBest ResponseYou've already chosen the best response.1
Then you use it to find the yintercept. Remember, the yintercept is at point \((0, y_{C})\)
 one year ago

geoffbBest ResponseYou've already chosen the best response.1
So, if you used point A, you could use \(\large m = \frac{y_{C}  y_{A}}{0  x_{A}}\)
 one year ago

DogLuverSarah2012Best ResponseYou've already chosen the best response.0
ok so once I have the yintercept???
 one year ago

geoffbBest ResponseYou've already chosen the best response.1
Then put it in the form y = mx + b. m is the slope, and b is the yintercept.
 one year ago

DogLuverSarah2012Best ResponseYou've already chosen the best response.0
Ok,I understand that part but how do i find teh standard form of the equation,my book says it would be Ax +By=C but it doesn texplain how to find the equation using 2 given points.
 one year ago

geoffbBest ResponseYou've already chosen the best response.1
Oh, sorry. I missed that part of your post. Standard form is just \(Ax + By = C\) (like you said). You can get it by rearranging your y = mx + b formula.
 one year ago

geoffbBest ResponseYou've already chosen the best response.1
Bring y and mx to the same side, to equal b.
 one year ago

DogLuverSarah2012Best ResponseYou've already chosen the best response.0
Ok so I have teh x and y intercepts figured out but how do I find C?
 one year ago

geoffbBest ResponseYou've already chosen the best response.1
C is just b (from y = mx + b)
 one year ago

DogLuverSarah2012Best ResponseYou've already chosen the best response.0
Ok thank you very much!!!
 one year ago
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