1. INTRODUCTION

2.2. Measurements and Derived Quantities

2.3. Sample Selection

2.4. Metallicities

2.5. Correcting for Diffuse Ionized Gas Contamination

2.6. Stacking Methodology

3. RESULTS

3.1. Mean $z\sim2.3$ Relations

3.2. Is There SFR Dependence of the $z\sim2.3$ MZR?

3.3. Do $z\sim2.3$ Galaxies Lie on the $z\sim0$ FMR?

4. DISCUSSION

4.1. Potential Evolution in Metallicity Calibrations and Ionized Gas Physical Conditions

4.2. Implications of the Evolution of the $M_{*}$-SFR-Z Relation

4.3. The Inconsistency of Results Based on O32

5. SUMMARY AND CONCLUSIONS