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|                                                                                |
| *                                                                           -  |
| 4                                                                    --------  |
| *                                                             -------          |
| *                                                      -------                 |
| *                                                -------                       |
| *                                          ------                              |
| 3                                     -----                                    |
| *                               ------                                      =  |
|                            -----                            ================   |
| *                     -----                     ============                   |
| *                 ----                ==========                               |
| 2             ----            =========                                        |
| *          ---          ======                                                 |
| *       ---       ======                                                       |
| *    ---      ====                                                             |
|    --      ===                                                                 |
| *--     ===                                                                    |
| 1    ===                                                                       |
| *   =                                                                          |
| *  =                                                                           |
| *==                                                                 -- U+221Ax |
| ********** * *******************************************************-- ln(x)** |
|                5                    10                   15                 20 |
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