Excel TREND Function
https://www.excelfunctions.net/excel-trend-function.htmlThe Excel TREND function calculates the linear trend line through a given set of y-values and (optionally), a given set of x-values. The function then extends the linear trendline to calculate additional y-values for a further supplied set of new x-values. The syntax of the function is: TREND( known_y's, [known_x's], [new_x's], [const])
Excel TREND Function
www.excelfunctions.net › excel-trend-functionThe Excel Trend Function finds the linear trend by using the least squares method to calculate the line of best fit for 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: