What is the answer to 1 and 2 will mark Brainlest

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

What situation is an example of an observational study

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. determine an equation to model his situation?