B + 11 = -12 can u help?

Me figure out the process to determine x you appreciate it : )

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.

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)