What is the range of the given data set? 15,16,17,18,19,20,21

The graph below could be the graph of which exponential function?

What 2 forces allow things to fall ‍♀️‍♀️

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?