In connecting those points, you arrive at a line graph. The horizontal axis functions the same in both of these cases. In a bar graph, however, the horizontal axis can take on a slightly different ...

Joel A. Bryan, Using Radioactive Decay to Investigate Exponential Functions, The Mathematics Teacher, Vol. 106, No. 1 (August 2012), pp. 52-58 ...

Exponential graphs Exponential graphs are graphs in the form y = k x. These graphs increase rapidly in the y direction and will never fall below the x -axis. An exponential graph will look like this: ...

If the graph of the quadratic function y = a x 2 + b x + c crosses the x-axis, the values of x at the crossing points are the roots or solutions of the equation a x 2 + b x + c = 0.

Carl N. Morris, Natural Exponential Families with Quadratic Variance Functions, The Annals of Statistics, Vol. 10, No. 1 (Mar., 1982), pp. 65-80 ...