An Educated Guess

Webcomic Storyline: 

Help Desk, by Christopher B. Wright

Comic Transcript: 

KING: Aha! That did it.

SCOTT: What? You found them?

KING: I think so. According to Google, Alex, Monk and Mark are currently about ten miles from Vegas, pushing Mark's broken-down car toward a gas station at a rate that can only be described as "painfully slow."

SCOTT: Google can actually give you the speed at which they're pushing the car?

KING: No, it's an educated guess. All of the ads Google chose to display on the page have to do with fitness programs and painkillers.