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.
What is a good way to show the relationship between two variables? Describe the steps you would take in making a graph to show the relationship between two related variables? The steps are to find the y-axis (dependent variable) and the x-axis (independent variable), then make a scale for your variables on the graph.