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support.microsoft.com/en-us/office/linest-function-84d7d0d9-6e50-4101-977a-fa7...

To find the slope of a line, often written as m, take two points on the line, (x1,y1) and (x2,y2); the slope is equal to (y2 - y1)/(x2 - x1). Y-intercept (b): The y-intercept of a line, often written as b, is the value of y at the point where the line crosses the y-axis. The equation of a straight line is y = mx + b.

www.excelfunctions.net/excel-linest-function.html

The Excel Linest Function uses the least squares method to calculate the line of best fit through a supplied set of y- and x- values. If there is a single range of x-values, the calculated line satisfies the simple straight line equation:

chandoo.org/wp/how-to-solve-an-equation-in-excel

I've used goal seek to solve equations, but it is not very useful when there are several possible solutions and one needs them all. I also have used trendlines in charts to find the equation for the line of best fit. Not quite the same as solving equations, but easier than running linear regressions to find the same result.

answers.microsoft.com/en-us/msoffice/forum/msoffice_excel-mso_mac-msoversion...

How do i find the equation of the line and R2? I don't have Excel 2008 handy to test, but usually one way is to right-click (or Control-click) the trendline, choose Format Trendline from the pop-up menu, click Options, click "Display equation on chart" and "Display R-squared value on chart," and click OK.

www.wallstreetmojo.com/equations-in-excel

Equations in excel are none other than our formulas which we type in cell, to write an equation we start with an equals to sign (=) which excel recognizes as to calculate and then we use variables which are connected with each other with some operators, depending upon the operators we get results, an equation can be both linear or non linear.

www.listendata.com/2012/10/excel-intersection-of-two-linear.html

In this article, we will see how to solve it with Excel. To find intersection of two straight lines: First we need the equations of the two lines. Then, since at the point of intersection, the two equations will have the same values of x and y, we set the two equations equal to each other. This gives an equation that we can solve for x

yourbusiness.azcentral.com/tangent-graph-excel-10558.html

Select "Linear," click the box for "Display Equation on chart" and click "Close." This trend line is an approximation for the actual tangent line. The equation for the trendline is displayed on the graph using the "y = mx + b" format. Using the previous example, this gives the approximate equation for the tangent line as "y = 0.5x + 2.5."

www.real-statistics.com/regression/least-squares-method

In Correlation we study the linear correlation between two random variables x and y. We now look at the line in the xy plane that best fits the data (x 1, y 1), …, (x n, y n).. Recall that the equation for a straight line is y = bx + a, where b = the slope of the line a = y-intercept, i.e. the value of y where the line intersects with the y-axis. For our purposes we write the equation of the ...

answers.microsoft.com/en-us/msoffice/forum/msoffice_excel-mso_imobile-mso...

I want to show my college class how to create an XY scatter plot on Excel, and to show the trendline together with the equation of the line, and R squared value. Our institution recently bought top of the line ipads for all students. Yet I cannot figure out how to get the equation of the line to show on the ipad.

social.technet.microsoft.com/.../finding-the-angle-of-trendline-in-excel-graph

In scattered table,i draw linear trend line. my trendline equation is y=5.3864x+37.5. I use an formula to find angle of trend line.The formula is