Find the distance between (6,-3) & (-1, 7) on the ccs

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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?

Is the figure congruent? yes or no?