Someone please help me Answer ASAP PLEASE!! <3

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?

Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?