Can someone please help me with question 1b) I need to show my work but am unsure of how to

Thanks

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

Which equation represents the function on the graph?