The given line graph represents the information about acid level in mouth from consumption of the sugar/honey. To begin with, we can see that there are categories in comparison which are fruit sugar, cane sugar, and honey. According to the graph, the three categories had decreased from the beginning at 7 and back to 7 at the end of this time period. Last but not the least, cane sugar had the lowest acid level in 5 minutes after eating with the figure of 3.5.In conclusion, the dashed line shows the acid level at which tooth decay is about to occur.