function value = f5 ( x )

%*****************************************************************************80
%
%% f5() evaluates trigonometric interpolation test function #5.
%
%  Discussion:
%
%    F5 is linear, but the first and last values don't agree.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    28 August 2019
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    real x, the evaluation points.
%
%  Output:
%
%    real value, the function value at x.
%
  value = 2.0 * x + 1.0;

  return
end

