#EXCEL TRENDLINE SLOPE WRONG HOW TO#

Column F: x squared values I then sum the columns B,C and E, the sums go in line 18 for me, so I have B18 as sum of Xs, C18 as sum of Ys, E18 as sum of X*Y, and F18 as sum of squares. вЂ“ Made 4 columns, for example: NB: my values y values are in B3:B17, so I have n=15 my x values are 1,2,3,4вЂ¦15. I successfully used the two functions given by MUHD in Excel: a = (sum(x*y) вЂ“ sum(x)sum(y)/n) / (sum(x^2) вЂ“ sum(x)^2/n) b = sum(y)/n вЂ“ b(sum(x)/n) (careful my a and b are the b and a in MUHDвЂ™s solution). HereвЂ™s how I applied the solution in Excel. Thank You so much for the solution, I was scratching my head. Public Trendline(IList yAxisValues, IList xAxisValues) Public Trendline CalculateLinearRegression(int values) This will add the trendline to the existing line graph.Thanks to all for your help вЂ“ I was off this issue for a couple of days and just came back to it вЂ“ was able to cobble this together вЂ“ not the most elegant code, but it works for my purposes вЂ“ thought IвЂ™d share if anyone else encounters this issue: public class Statistics

The Chart Elements dialog box appears.

Now select the chart and then click on the вЂњ+вЂќ button in the top right corner of the Chart.

Plot the line graph by selecting the dataset and then go to the Insert Tab and then click on Insert Line or Area Chart.

Here, y1=2 and stored in the location B2 and y2=4 stored in location B3 and x1=1 stored in the location A2 and x2=2 stored in the location A3 of the worksheet. The array ranges from A2 to A11.Д¬onsider the points (1,2) and (2,4). The X-axis array is stored in A column of the Excel sheet. Here, Y-axis array is stored in B column. From the equation of the trendline we can easily get the slope. By plotting a trendline on the line graph and find its equation.

Use the formula and вЂњ-вЂњ,вЂќ/вЂќ operators to find the slope, m.ДЈ.

From the data set take any pair of points.

Known_xs : An array of numeric data points which are independent.Дў. These are dependent on value of horizontal axis. Known_ys : An array of numeric data points which are dependent.

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#EXCEL TRENDLINE SLOPE WRONG HOW TO#

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Excel trendline slope wrong