TI-Nspire’s regression tools can easily fit equations such as y = axb (Power law) or y=a.bx (Exponential law) to experimental data. However, traditional methods involved looking for a straight-line graph when log10 y was plotted either against log10 x or against x. In some examinations, students are still asked to use logs in this way and this activity is designed to help students understand why this method works.
Teacher Notes (17 pages including worksheet solutions);
Two TI-Nspire documents with data for Power Law and Exponential Law;
Two students worksheets;
Two Powerpoint presentations to support those who are unfamiliar with TI-Nspire.