def chebline(off, scl):
if scl != <NUM_LIT:0>:<EOL><INDENT>return np.array([off, scl])<EOL><DEDENT>else:<EOL><INDENT>return np.array([off])<EOL><DEDENT>
Chebyshev series whose graph is a straight line.



Parameters
----------
off, scl : scalars
    The specified line is given by ``off + scl*x``.

Returns
-------
y : ndarray
    This module's representation of the Chebyshev series for
    ``off + scl*x``.

See Also
--------
polyline

Examples
--------
>>> import numpy.polynomial.chebyshev as C
>>> C.chebline(3,2)
array([3, 2])
>>> C.chebval(-3, C.chebline(3,2)) # should be -3
-3.0