You will need
- Copy of the graph above
Use a line of best fit to make predictions about hand reaction time
- Place a ruler on the graph so it covers all the dots – make sure the ruler has the same downward slope as the data.
- Now, turn the ruler on its side (thin edge of the ruler on the page).
- Keeping the slope the same, move the ruler so that approximately half of the data points appear above the edge of the ruler and half are below it.
- Now, draw a line along the edge of the ruler. This is a line of best fit! Continue reading Try this: Predicting reaction time