The graph below shows the cost of bag tags based on the number of bag tags ordered: a graph is shown. the title of the graph is bag tags. the horizontal axis label is number of bag tags. the horizontal axis values are 0, 3, 6, 9, 12, 15. the vertical axis label is cost in dollars. the vertical axis values are 0, 9, 18, 27, 36, 45. points are plotted on the ordered pairs 3,9 and 6,18 and 9,27. the cost of 1 bag tag is $ input only whole numbers, such as 8