50 POINTS. help I'm not rushing so late answers are appreciated!

Books at a library sale are sold for $3.50 each. A function, y = 3.50x can be used to generate an input/output table for this scenario. Which statement is true about an accurate graph of this data?
The data is continuous, so it does not matter whether or not the points are in a line.
The data is discrete, so the graph is a series of unconnected points.
The data is continuous, so the graph is a series of unconnected points.
The data is discrete, so the points are connected with a line.