def cloud_cover_to_transmittance_linear(self, cloud_cover, offset=<NUM_LIT>,<EOL>**kwargs):
transmittance = ((<NUM_LIT> - cloud_cover) / <NUM_LIT>) * offset<EOL>return transmittance<EOL>
Convert cloud cover to atmospheric transmittance using a linear
model.

0% cloud cover returns offset.

100% cloud cover returns 0.

Parameters
----------
cloud_cover : numeric
    Cloud cover in %.
offset : numeric, default 0.75
    Determines the maximum transmittance.
kwargs
    Not used.

Returns
-------
ghi : numeric
    Estimated GHI.