+----------------------+
            ^ y                                         | f(x) = 10*sin(0.3*x) |
            |                                           +----------------------+
            |
            |
            |    ..                   ..                   ..
            |   .  .                 .  .                 .
            |  .                    .                    .   .
            |       .                    .                    .
            | .                    .                    .
            + 5
            |        .                    .                    .
            |.                    .                    .
            |
            |    5    .                    .                    .              x
------------.----+---------------.--------------------.------------------------>
  .         |
            |          .                    .                    .
           .|                   .                    .
   .        |           .
            |                                .      .             .
          . |                  .
    .       |            .                    .                    .
         .  |                 .                    .                    .
     .  .   |             .  .                 .  .                 .  .
      ..    |              ..                   ..                   ..
            |
            |