![]() ![]() The second type is called a log-log graph. When graphed on semi-log paper, this function will produce a straight line with slope log (a) and y-intercept b.Įxample: Plot the function y = 5 x on an ordinary axis (x- and y- linear scales) as well as on a semi-log axis. Consider a function of the form y = ba x. The x-axis has a linear scale, which means the ticks are evenly spaced.Ī semi-log graph is useful when graphing exponential functions. In a semi-log graph the y-axis is logarithmic, which means the seperation between the ticks on the graph is proportional to the logarithm of numbers. There are two types of log graphs that can be used when plotting data. Logs are helpful when plotting certain types of data. Let's take a closer look at the difference between semi-log and log-log graphs.
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