We do not have a `log_2 x` button on our calculators. The only way we can do this for now is to draw up a table of values and plot the points, or use a computer.

Later we will see how to plot this using the change of base formula which we meet in 5. Logs to the Base e.

Using a computer to graph it gives us:

1234567891024681012-2-4xyOpen image in a new page

Graph of `y=3log_2 x`.

Unlike the graph in the previous example, this graph does not have a limiting value as x increases.