"Presenters are usually guilty of including too much data in their on-screen charts," says Garr Reynolds, author of Presentation Zen. It's not that charts are bad in a PowerPoint presentation, but ...

To help draw a straight line graph from its equation, fill in a table of 𝑥 and 𝑦 values. Plot the pairs of values as coordinates and join to make a line. Make sure you are confident with ...