2. a style of dance music marked by some of the features of jazz.
The graph of y = 2x+1 is a straight line. 1  When x increases, y increases twice as fast, hence 2x. 2  When x is 0, y is already 1.  So: y = 2x + 1.
In mathematics, the term linear function refers to two distinct but related notions: 1  In calculus and related areas, a linear function is a polynomial function of degree zero or one, or is the zero polynomial. 2  In linear algebra and functional analysis, a linear function is a linear map.