The voltage output (y) of a battery was measured over a range of temperatures (x) from 0°C to 50°C. The following figure is a scatterplot of voltage versus temperature, with three fitted curves superimposed. The curves are the linear model y = Bo + B,x + ɛ, the quadratic model y = Bo + B;x = B2x? + ɛ, and the cubic model y = Bo + B;x + Bx? + B3x² + ɛ. Based on the plot, which of the models should be used to describe the data? Explain. The linear model. ii. The quadratic model. iii. The cubic model. iv. All three appear to be about equally good. 115 110- E 105 100 90 85 10 20 30 Temperature ("C) 40 50 (A) ndino adeoA

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