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anonymous
 5 years ago
Can someone explain finding the equation of a line step by step
anonymous
 5 years ago
Can someone explain finding the equation of a line step by step

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0There are a number of ways to do it depending on what information you have. Typically you'll be given either a point and a slope, or given 2 points.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Okay say im given two points

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Ok, then you must first find the slope.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Do you know how to find the slope of a line, given 2 points?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[Slope =\frac{y_2y_1}{x_2x_1}\] Where \((x_1,y_1)\) is the first point and \((x_2,y_2)\) is the second.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The slope is how much the function (y) changes as the input (x) changes.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Our teacher said it's pretty much rise over run correct?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So \[ Slope = \frac{\text{Change in y}}{\text{Change in x}}\] And we can find the difference in x and the difference in y by subtracting the x and y values at the respective points.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yes. How much you rise over how far you ran.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Once you know the slope, you can plug in the slope, and one of your points into the point slope formula.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So if I had a line that passes through (2,4) and (8, 7) wouldn't the slope be 3/6

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yes, but you can simplify that.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Now plug that slope into the point slope formula along with one of your points.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Okay so if I had (4,8) and (3, 1) It would be 7/7?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Double check that you are putting the same point for x1 that you're putting for y1 and vice versa.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0It doesn't matter which one you pick to be point 1 or point 2, but you have to keep them consistant. You can't use one for point 1 on top, then switch it on the bottom.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Okay, makes sense. So say they give me just y=2x, what does that mean

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0That means you have the slope intercept form.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0where the coefficient on the x term is your slope.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So how do I put it into y=mx+b form?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0b (the constant term) is the y value where the line crosses the y axis.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0It is in y=mx+b already

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well Im not sure, the problem is matching up the graphs to the equation '

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0No, I'm saying if you have an equation y = 2x y = 2x + 0 y = mx + b It is in slope intercept form.
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