Open the sonar data file in Microsoft Excel. The sonar data
file contains a spreadsheet with data, and a sample output graph
for "Lake Katie." The data is arranged in a grid, with each cell
corresponding to a place on the lake. Each number is the amount of
time that it took the sound to bounce off the bottom of the lake
and return in that spot.
Use the data to make a graph of the bottom of Lake Katie. You
should use the "Surface" Chart Type.