9.24(2)

Model selection d = d e g r e e . o f . p o l y n o m i d d = degree .of .polynomid d=degree.of.polynomid d = 1 , h θ ( x ) = θ 0 + θ 1 x d=1,h_{\theta}(x)=\theta_0 +\theta_1x d=1,hθ​(x)=θ0​+θ1​x d =

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