Every day, a group of people get together and determine something that will affect millions of bettors. These people are odds makers. Their calculations set the lines for sporting events across the globe. You’ve probably wondered exactly how they decide those numbers. Here’s everything you need to know about how NFL odds work. What’s the Point?   Image via Flickr by Art01852 To understand NFL odds, you must appreciate the design of the system. Gambling services don’t care who wins or loses a sporting event. They’re businesses, and their product relies on volume. When they entice more people to bet,…