Use a response trace plot to examine the effect of each component on the response. The trace curves show the effect of changing the corresponding component along an imaginary line connecting the reference blend to the vertex. Keep the following in mind when you interpret a response trace plot:
Interpret all components relative to the reference blend.
Components with the greatest effect on the response will have the steepest response traces.
Components with larger ranges (upper bound - lower bound) will have longer response traces; components with smaller ranges will have shorter response traces.
The total effect of a component depends on both the range of the component and the steepness of its response trace. The total effect is defined as the difference in the response between the effect direction point at which the component is at its upper bound and the effect direction point at which the component is at its lower bound.
Components with approximately horizontal response traces have virtually no effect on the response.
Components with similar response traces will have similar effects on the response.