Least-Squares Regression Line. Conic Sections: Parabola and Focus. example
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2)its gives solution in 2 different ways when necessary, 99/year one, and look forward to continue to use this app, and the best part it can even be a shoe you how to solve it, aside from providing me with answers it is intuitive and has an easy to follow step by step guide.
And this is a LIFE SAVER. Being able to just take a picture of the problem and then being able to see all the steps is so convenient and helpful, but the problem is you just need to buy a premium or to log in there app just to know the "solution" of how did they get the answer :(.
Step 1: For each (x,y) point calculate x 2 and xy. Step 2: Sum all x, y, x 2 and xy, which gives us Σx, Σy, Σx 2 and Σxy (Σ means sum up) Step 3: Calculate Slope m: m = N Σ(xy) − Σx Σy N Σ(x 2) − (Σx) 2 (N is the number of points.) Step 4:
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Clarify mathematic equation
In mathematics, an equation is a statement that two things are equal.
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We want to estimate the regression line parameters a and b. In the standard least square method, we can work out a few auxiliary values which
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