What the answer for this I need help

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!