What is it?

This is a revolutionary new stationery instrument. It has all the uses of a traditional ruler, but can also help you to draw the best fit line on a scatter graph much more accurately and easily than you can with a traditional ruler.

How do you use it?

Use the BFLR to draw your graph as normal. Plot the points as normal. Then use the BFLR grid to locate the best position for the best fit line, as indicated by the central slot in the BFLR. Slide your pencil along the central slot to produce a crisp and accurate best fit line.

Drawing a best fit line on a graph in maths, physics, biology, chemistry, geography or even design & technology can be a very important graphical skill. The best fit line ruler makes the job much easier to draw your best-fit lines and for GCSE or A Level studies there are often marks awarded for showing the data trend line so using a bestfitlineruler can be useful for gaining these points. In analysis of experimental results a bestfit line ruler will allow you quickly and easily spot any linear pattern in the data and draw the line of best fit with ease.