The number of systems connected inmay vary from as least as two to as much as 16 million

answer: a, c

divide any of the y values by x values and you will always get 3 is the most simple way i can put it for you.

i think its c but i'm not

professionals can use many types of technology that can them. some examples are, computers (they research and can use for programs for data, they are also used for job applications, school work, and even to make new ideas), speedometers (can get data for unknown data), sometimes something as small as a pen (used for rough drafts, to insert data, and again job applications).