I’ve always wondered how the phrase “A picture is worth a thousand words” came about. I like to think that it was coined by some mid-level manager viewing a sales figures report that consisted of metrics from the past 1,000 days. After scanning this long list of numbers, he found, at the bottom of the page, a line chart that summarized the numbers, and uttered that now well-known adage. Charts and graphs provide a succinct synopsis of large amounts of data. With charts a person can quickly spot trends, compare different resultsets, or recognize patterns.