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.
And look what kind of line it is; it is a straight line! If you are given a linear function, there are two ways to work with it. You can use algebra and calculate your answers or you can graph the function and use the graph to get your answer. Look at the graph above for the function y = 2x.