Leticia has been selling solar-powered laptop chargers through her Web site, with monthly sales as recorded below. In a report to investors, she states, “Sales reached a point of inflection when I started using pay-per-click advertising.” In which month did that occur? Explain.

Transcribed Image Text:

Month 1 2 Sales 2 30 3 4 5 6 50 60 90 150 7 230 8 340