Can someone help me with this math homework please!

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.

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Y+ 2/y is it a polynomial in one variable or not? and if so, why?