=+5.57 ● A study, described in the paper “Prediction of Defibrillation Success from a Single Defibrillation Threshold Measurement” (Circulation [1988]: 1144–1149) investigated the relationship between defibrillation success and the energy of the defibrillation shock (expressed as a multiple of the defibrillation threshold) and presented the following data:

Energy of Shock Success (%)
0.5 33.3 1.0 58.3 1.5 81.8 2.0 96.7 2.5 100.0

a. Construct a scatterplot of y 5 success and x 5 energy of shock. Does the relationship appear to be linear or nonlinear?