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anonymous
 one year ago
What is the equation of this line of best fit in slopeintercept form?
anonymous
 one year ago
What is the equation of this line of best fit in slopeintercept form?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Dan drew the line of best fit on the scatter plot shown below:

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0here we have to apply the least square method, in order to get the right equation for constants A and B, such that: y=Ax+B

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Since you already have the line of best fit you first need to understand the concept of slopeintercept form which is: y = mx + b I'd first calculate the yintercept then slope.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so then Its either y = 3x + 5/6 or y = 3x + 6/5

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You're mixing the yintercept and slope up… the yintercept is the point of the line where x = 0. That would make (0, 3) the yintercept.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0As for the slope, try again.. you understand the basic concept.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The yintercept is where the point and line meets?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0here are the formulas for the coefficients A, and B: \[\Large \left\{ \begin{gathered} A = \frac{{N\sum {{x_i}{y_i}  \left( {\sum {{x_i}} } \right)\left( {\sum {{y_i}} } \right)} }}{{N\sum {x_i^2  {{\left( {\sum {{x_i}} } \right)}^2}} }} \hfill \\ \hfill \\ \hfill \\ B = \frac{{\left( {\sum {x_i^2} } \right)\left( {\sum {{y_i}} } \right)  \left( {\sum {{x_i}} } \right)\sum {{x_i}{y_i}} }}{{N\sum {x_i^2  {{\left( {\sum {{x_i}} } \right)}^2}} }} \hfill \\ \end{gathered} \right.\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The yintercept is where the line crosses the yaxis.

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0where N is the number of experimental points

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0experimental points? what does the E stands for?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0where is the E ?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0with experimental points, i mean the number of points, namely: N=11

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The big numberal sign you see repeating

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oooh it stands for equation

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0it is the capital \sigma

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0\[\Large \Sigma \] stands for summation

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Im not getting how to find the slope intercept..?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0for example, we have: \[\Large \sum\limits_{i = 1}^5 {{x_i}} = {x_1} + {x_2} + {x_3} + {x_4} + {x_5}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0O_O what does all those signs and numbers suppose to mean again?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Im not sure anybody told me yet ::

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0nevertheless I think that we have to write the equation of the line represented in your drawing. In order to that we note that your line passes at point (5,9) and at point (10,15) so we have to write the equation of a line which passes at those points

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0In order to calculate slope, note that it is rise/run or: y2  y1/x2  x1 (Using two points to plug in)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I remember hearing about rise over run

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but what does the numbers do ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Awesome! The numbers next to the x and y are sub numbers… they don't really mean anything

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I mainly used to refer to them as numbers that would help me keep organized

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh so they are just for show?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Technically, no, but you can look at it that way :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You pronounce "y2" as "y sub 2"

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if i had a equation like this : y = 3x + 6/5 why is there a fraction in their and what do i do about it

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well, "6/5" represents slope: meaning that you would rise 6 units, and run (towards the right since it is positive) 5 units.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh ok I think Im good thanks

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay, cool! So, usually I start at the yintercept before I rise or run if I have a graph.. there are many ways to calculate slope, but since you have a graph, it's easier to have a visual representation that way.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1436729744129:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So, we can choose ANY two points that are on the line.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Let's take: (1, 4) (5, 9)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0We can name both of these pairs as: (x1, y1) (x2, y2) Make sense?
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