Tea Tree Oil is used commercially in many products including shampoos, body lotions and toiletries, but there is no legislation requiring manufacturers to state the concentration of tea tree oil in these products.
Line Graphs. One of the most common graphs you will encounter is a line graph. Line graphs simply use a line to connect the data points that you plot. They are most useful for showing trends, and for identifying whether two variables relate to (or correlate with) one another.
A bar graph, also known as a bar chart, is a graph that uses rectangular bars to represent different values to show comparisons among categories, such as the amount of rainfall that occurred during different months of a year, or the average salary in different states./d5kh2btv85w9n.cloudfront.net/7/7f/Make Bar Graphs Step 1 Version 4.360p.mp4. 1  Another use of rectangular bars on a graph is called a histogram , not bar graph, to display a continuous range of data in increasing or decreasing value in a list of equally divided range segments to show how these compare.