I have written an Excel spreadsheet which calculates the exponential decay of radioactive substances. That was easy compared to getting the thing to graph properly. I want it to display 1 curve (an exponential decay). Actually, I am displaying the values as a bar graph (or histogram), which still illustrates the decay nicely.

The data is ALL there for the graph to use. Ten values of radioactivity (y-axis) and ten values of time (x-axis).

The graph displays properly as do the y-axis values.

However, the x-axis values don’t show up at all OR they are displayed as data point values 1, 2, 3, 4, 5, 6, etc - big help there huh?

I do not see why this should be such a problem. I don’t see why the math would create a problem. Basically, I am just trying to plot changing values (y-axis) against time (x-axis). I *thought* this would be a very simple thing to do. This must be one of the most popular type of graphs. For example, a child’s height (y-axis) over a period of time (x-axis). So, why aren’t those x-values showing up at the bottom of the graph?

Any help would be appreciated.

Thanks.