Q: Question:How do I connect my MacBook Air so my Epson Stylus Color 740i Ink Jet Printer will print?

Click here >  Epson Stylus COLOR 740, Drivers & Downloads - Technical Support - Epson America, Inc.

Then click Please select to the right of Operating System.

It appears that printer is only compatible with Mac OSX up to 10.6.

First, the Epson Stylus Color 740 (which I assume is your printer) is listed in this article, which is good news:

http://support.apple.com/kb/HT3669

So Apple can provide its driver software.

This article tells you how to set up your printer:

http://support.apple.com/kb/HT4670

Glad that helped!  Enjoy your MacBook Air!

By the way, if you have an iPhone or iPad, you can get some very limited printing capability to the Epson Stylus Color 740 from that device by downloading the (free) Epson iPrint app on your i-device.