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.
Equations. Linear equations are in the form y = mx + b, whereas quadratic equations have a variable that is squared, so they are in the form y = ax^2 + bx + c. Graphs. The graph of a linear equation on an x-y coordinate plane is a straight line. A quadratic equation results in a graph shaped like a parabola. Slope