B D Number of Homework Problems Alex recorded the amount of time he spent completing homework assignments with different numbers of problems. He also created a quadratic model that could be used to estimate the time needed to complete an assignment consisting of a certain number of problems. He computed the residual values for different numbers of problems and created the residual plot shown. Based on the residual plot, which of the following statements identifies whether Alex's model is appropriate for the data and provides an appropriate reason to support the identification? 400 F1 1 The model is appropriate because all of the residual values are between 1 and 1. 11 Residual (minutes) The model is appropriate because half of the data values are underestimated and half of the data values are overestimated. The model is not appropriate because the residual plot appears to be randomly distributed. 28 F2 The model is not appropriate because the residual plot forms a linear pattern. 1 # 1.0- 80 F3 0.5 € 0 -0.5 F4 % FS 6 & MacBook 8 1 8 F7 ( n DII FB ) C DO FA FO a = 0 F10 ? ch + F11

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