Determine if each relationship represents a function choose yes or no for each relationship

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great