Which of the following relations is not a function?
a. (-7, 4), (2, 3), (-1, 1), (7, 2)
b. (7, 4), (-1, 2), (2, 1), (-7, 2)
c. (2, 4), (-1, 2), (2, 1), (-7, 2)
d. (-1, 4), (2, 2), (7, 1), (-7, 5)

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y > 2x + 3y is less than negative 3 over 2 times x minus 4part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points)part b: is the point (â’4, 6) included in the solution area for the system? justify your answer mathematically. (4 points)