Hui,
First of all, THANK YOU! It worked even with 6 decimals in scientific format.
Your succinct instructions directed me to "format trendline" rather than "format trendline label". However, after little fidgeting I got it right.
Problem Solved!
1. Sulfuric acid densities empirical table: column I concentrations in 0.5% increments, column II the corresponding measured densities.
2. I plot the curve "measured density"=f(%).
3. I plot the trendline as 5th order polynomial with R=1, perfect visual match.
4. Using this polynomial...