function dydt = exp_deriv ( t, y )

%*****************************************************************************80
%
%% exp_deriv() evaluates the right hand side of exp_ode().
%
%  Discussion:
%
%    y' = alpha * y
%    y(t0) = y0
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    22 April 2021
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    real T, Y: the time and solution value.
%
%  Output:
%
%    real DYDT: the derivative value.
%
  [ alpha, t0, y0, tstop ] = exp_parameters ( );

  dydt = alpha * y;

  return
end

