This tool uses the Data Table feature to plot 500 values of the function over the specified range. Two data tables are used, one for the X values and another for the Y values. The tables are in columns W through Z. The defined formula dt is used to calculate the step size.

The X and Y values are plotted on the X-Y chart.

Do note that numerical methods have limitations and these must be kept in mind while using them or while interpreting the results obtained from them. Read this wiki page on numerical methods for an overview.