If you’ve ever sat through a PowerPoint presentation or read a quarterly report, you’ve probably been bored by a chart or graph. Chances are, it was blue, red, and yellow on a gray, lined background.

Microsoft Excel doesn't always provide everything you need when it generates graphs. For example, by default, your line graph doesn't included a title. However, this doesn't mean you have to go ...

The graphs above, \(y = 2x + 1\) and \(y = 2x - 2\) have the same gradient of 2. The lines are parallel. State the equation of a line that is parallel to \(y = 3x + 7\). To be parallel, two lines must ...