Eyeballing the line of best fit

The topic of  is under the Probability and statistics Math Mission. This exercise visualizes linear trends in scatterplots.

Types of Problems
There is one type of problem in this exercise:


 * 1) Find the line of best fit: This problem displays a scatterplot with several data points. The student is to use the manipulative to sketch the line of best fit, or otherwise indicate that there is no line that fits the data well.Linefit.png

Strategies
This exercise is hard to get accuracy because the manipulative feels like it is a little touchy, being off by a little can cause the answer to be incorrect. The speed badges are easy if you can find a way to ensure that you get the answer correct because it is fast to move points in the manipulative.
 * 1) Regression measures the line of best fit, not association. If there is a pattern but it is not a line, you must click that there is no line that fits the data.
 * 2) It seems it is easier to get the answer as correct if you pull the points of the line far to the left and right. This allows fine movement of the line up and down.