Conclusion. In this article we have seen how to use Curve fitting, also known as regression analysis, Curve fitting is used to find the “best fit” line or curve for a series of data points. curve fitting mostly creates an equation that is used to find coordinates along the path, you may not be concerned about finding an equation. Square Root Chart | 50 Perfect Squares. Brighten your preparation with this printable illustration featuring the square roots of first 50 perfect squares in a neat tabulation. Designed to work as an excellent reference while solving problems involving square roots, this is yet another must-have tool.