The WMAP data, combined with small-scale CMB measurements and large-scale structure data, support the predictions of inflationary models. The detection of a large-angle anti-correlation in the temperature-polarization cross-power spectrum is a signature of adiabatic superhorizon fluctuations at decoupling. The data are consistent with pure adiabatic fluctuations, and an upper limit is placed on a correlated CDM isocurvature component. The scalar power spectrum and gravity wave amplitude constraints help explore inflationary models. A minimally-coupled λφ⁴ model is disfavored at more than 3σ. The parameters n_s, dn_s/dlnk, and A are constrained to n_s=1.20±0.11, dn_s/dlnk=-0.077±0.052, and A=0.71±0.10. The tensor parameter r is less than 1.28 at 95% confidence. The paper discusses implications for inflationary models, including single-field and double-field models, and the evidence for features in the inflaton potential. The results suggest that inflationary models with adiabatic, nearly scale-invariant fluctuations are consistent with the data. The analysis of the scalar spectral index running and tensor modes provides constraints on inflationary models, with the λφ⁴ model being disfavored at high significance. The results indicate that the scalar power spectrum is nearly scale-invariant, and the tensor modes are not detected. The data support the existence of superhorizon adiabatic fluctuations, and the results are consistent with the predictions of inflationary models. The analysis of the parameter space of inflationary models shows that the data are consistent with a wide range of models, but exclude certain models like the λφ⁴ model. The results provide constraints on the parameters of inflationary models, including the scalar spectral index, running, and tensor amplitude. The paper concludes that the data support the predictions of inflationary models and provide constraints on the parameters of these models.The WMAP data, combined with small-scale CMB measurements and large-scale structure data, support the predictions of inflationary models. The detection of a large-angle anti-correlation in the temperature-polarization cross-power spectrum is a signature of adiabatic superhorizon fluctuations at decoupling. The data are consistent with pure adiabatic fluctuations, and an upper limit is placed on a correlated CDM isocurvature component. The scalar power spectrum and gravity wave amplitude constraints help explore inflationary models. A minimally-coupled λφ⁴ model is disfavored at more than 3σ. The parameters n_s, dn_s/dlnk, and A are constrained to n_s=1.20±0.11, dn_s/dlnk=-0.077±0.052, and A=0.71±0.10. The tensor parameter r is less than 1.28 at 95% confidence. The paper discusses implications for inflationary models, including single-field and double-field models, and the evidence for features in the inflaton potential. The results suggest that inflationary models with adiabatic, nearly scale-invariant fluctuations are consistent with the data. The analysis of the scalar spectral index running and tensor modes provides constraints on inflationary models, with the λφ⁴ model being disfavored at high significance. The results indicate that the scalar power spectrum is nearly scale-invariant, and the tensor modes are not detected. The data support the existence of superhorizon adiabatic fluctuations, and the results are consistent with the predictions of inflationary models. The analysis of the parameter space of inflationary models shows that the data are consistent with a wide range of models, but exclude certain models like the λφ⁴ model. The results provide constraints on the parameters of inflationary models, including the scalar spectral index, running, and tensor amplitude. The paper concludes that the data support the predictions of inflationary models and provide constraints on the parameters of these models.