Nexus 4 and AT&T Prepaid Data Question

I'm the only one in my family that has a smartphone and am planning to ditch Verizon for AT&T so I can use the Nexus 4.

What I want to know is, can my family sign up for the talk/text only plan and have my Nexus 4 included and then

I purchase a separate prepaid $15 a month data plan for only the Nexus 4?