Graphs and how to make them RIGHT!!!

Mrs. ReynoldsPhysics

What is wrong with this graph?

What is wrong with this graph?It is too small!!! A larger scale should be used so that it takes up most of the page.

What is wrong with this graph?

What is wrong with this graph?The trendline is not drawn correctly giving an inaccurate slope. The red line I have drawn goes much more closely to all the data points.

What is wrong with this graph?

What is wrong with this graph?The scale is wrong on the y-axis. From point A to point B, there is a change of 9 (because 38-29=9) but from point B to point C there is a change of 6 (because 54-38=6).

• A

• B

• C

What is wrong with this graph?

What is wrong with this graph?We need one straight trendline. It is not connect-the-dots!

What is wrong with this graph?

What is wrong with this graph?The trendline is not straight. We need to use a ruler or something else with a straight edge to make sure our trendline is STRAIGHT.

Resources

• For more information, check out: http://jacobsphysics.blogspot.com/2011/06/bad-graphs-common-mistakes-on-data.html

• And check out: http://jacobsphysics.blogspot.com/2011/06/bad-graphs-part-ii-dont-force-best-fit.html