function title = p21_title ( )

%*****************************************************************************80
%
%% p21_title() returns a title for test 21.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    23 February 2026
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    string title: a title for the test.
%
  title = 'f(x) = 1.2 + cos ( x ) + 0.1 * x';

  return
end

