In this activity students use their Log Tapes as a reference for ordered pairs, and graph positive numbers as a function of
their base-10 logarithms. They extend each plotted point to the vertical axis, thereby generating a logarithmic scale that
cuts and folds into an improvised slide rule. This is activity E1 in the "Far Out Math" educator's guide. Lessons in the guide
include activities in which students measure,compare quantities as orders of magnitude, become familiar with scientific notation,
and develop an understanding of exponents and logarithms using examples from NASA's GLAST mission. These are skills needed
to understand the very large and very small quantities characteristic of astronomical observations. Note: In 2008, GLAST was
renamed Fermi, for the physicist Enrico Fermi.