Hi Dianne,
There's a shortcut to create a chart instantly. That would be to select
a range of cells and then press the F11 key on the keyboard. Perhaps you
did that.
I'm willing to bet you made what's called a "chart sheet." A chart
sheet is a worksheet that is nothing but a chart. Look near the bottom
of the spreadsheet and your chart is probably on a tab called "chart 1."
Simply click a different tab and I'll bet you will find your data.
-Jim