Figure 3: Chemotaxis index and mean worm position are similar across a range of values and test conditions.

Each point represents the chemotaxis index and mean worm position computed from a single assay. The dataset represents 288 assays of the response of wild-type worms to 96 compounds ($\mathrm{N}=3$ biological replicates). Black line is a least-squares fit to the data with a slope of .061 $\left(R^2=0.966\right)$, the shaded area shows the 95% confidence interval for the fit.