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who knew calculating a trend line would be so tricky. I gave up on the stretch goals 😞
Had a fun time with this one. I made a chart very similar to the example, but there's no point in showing that one. Here's one with trend lines.
Spoiler
I cheated a bit on the trend lines. I found a macro in the public Gallery that does a linear regression and returns the slope and intercept of the regression line. I was able to drop that into a formula and generate points for the line. Never leveraged Community like that before. A good lesson learned.
Attached is my workflow. Created chart, then used linear regression to find trend lines for 2nd chart. Based intersection calculation on the linear regression results and calculating the intersection of the lines using the point slope method and cross solving (think quadratic formula type math).
