2 SAMPLE SELECTION
2.1 The SAMI Galaxy Survey
2.2 Our Subsample

3 ESTIMATING THE MOLECULAR GAS SURFACE DENSITY (  $\Sigma_{\mathrm{gas}}$  )
3.1 Deriving Turbulent Mach Number Maps ( M )
3.2 Deriving $\left(\Sigma_{\mathrm{gas}}/t\right)_{\mathrm{multi-ff}}$ and $(\Sigma_{\mathrm{gas}}/t)_{\mathrm{single-ff}}$
3.3 Estimating the Gas Density $(\rho)$ and Local Freefall Time $\left(t_{\mathrm{ff}}\right)$
3.4 Deriving Our Final Product, $\Sigma_{\mathrm{gas}}$
3.5 Uncertainties in the $\Sigma_{\mathrm{gas}}$ Reconstruction

4 RESULTS
4.1 Gas Surface Density Estimates
4.2 Comparison Between Star-forming and Composite/AGN/Shock Galaxies

5 COMPARISON TO PREVIOUS Σ SFR VERSUS  $\Sigma_{\mathrm{gas}}$ RELATIONS

6 COMPARING $\Sigma_{\mathrm{gas}}$ PREDICTIONS BY INVERTING STAR FORMATION LAWS

7 CONCLUSIONS