2. Graphing

3. What is a Graph? When to use a Line Graph When comparing variables, use a line graph. Bar graphs are used when comparing apples and oranges (unrelated data).

4. What is a Graph? Weight Age What is a Graph? Put the Variables on the Correct Axes The independent variable (one that influences) is on the x-axis The dependant variable (one that is influenced) is on the y-axis Example: Age vs. Weight Which influences? Older because you weigh more? Or weigh more because you’re older. Weight Age

5. What is a Graph? Take the data from both axes and make a point where they intersect. Don’t Connect the dots, instead draw a smooth line or curve that represents the general trend of the data. Abrupt Changes in the curve show something significant is occurring. Weight Age

6. What is a Graph? Always use a ruler and graph paper (search on google if you need it) Curved axes, and squiggly trend lines look sloppy and also don’t allow you to use your trend line to make accurate predictions. Weight Age

7. What is a Graph? There is a correct way to title the graph. The effect of (independent variable) on (dependant variable). Units must be labeled on both axes. Weight Age The Effect of Age on Weight (Lbs.) (Years)

8. What is a Graph? The data in the graph should fill the page. When setting up your graph and scale of each axes, look at your data points to use the entire graph. It makes it easier to read trends. Weight Age The Effect of Age on Weight (Lbs.) (Years) No!