Math probability question

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.

Me d is also an option but i couldn't get it in the picture

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is