Slang uses invented words and assigns new meanings to old ones.
a. true
b. false

true.

Explanation:

Slang is a part of all languages, usually identified with sub-groups in a community, that make use of non-standard registers in order to capture new or complex realities of this sub-group that cannot be fully accounted for through standard language conventions. The ways that slang words are implanted in a sub-group are spontaneous; however, they always carry meaning and sense, sometimes through sheer invention. Many argue that slang enriches languages, not the other way around.  

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here is the answer its my picture of my notebook