Why do NBA teams play different number of games with different teams?

Answer 1

To answer this question, remember the NBA is divided into two conferences: Eastern and Western. This is beside the point but geography must have escaped the NBA. Here's an example, last time I checked a map New Orleans was located closer to New York than Los Angeles but to answer your question.

To start simply, Western conference teams play Eastern conference teams twice a year. The New York Knicks will play the Los Angeles Lakers once in New York and then the second time in Los Angeles.

Within the conference, the Western conference teams will play others in the conference 3-4 times before the end of the season. So the Sacramento Kings will play the Phoenix Suns 3-4 times a year alternating between Sacramento and Phoenix. The NBA also factors that 41 games will be played on the road and 41 at home. I think it also is a factor what events are happening at certain arenas during the year why some teams face each 3 or 4 times. It basically balances out over the years.

Hope this helps!
First, there are the Conferences (i.e. Eastern Conference and Western Conference) then there are Divisions (Pacific, Northwest and Southwest, Atlantic, Central, Southeast respectively)
Any given team will play other teams in the opposing conference twice; once at home and once away. Next, a team in within the conference (but not in said teams division) will be played up to 4 times. Lastly divisional games which will pit the two teams 4 times a year with both having two home games.