UV slope as a function of stellar mass in two redshift bins: 2 <  z <  3.5 and 3.5 <  z <  5 (red and blue, respectively), where 3.5 is the median redshift of VANDELS. A linear fit to the relations in each redshift bin is also shown via dashed lines with their corresponding colors. The M_*–β relation from McLure et al. (2018a) at z <  3 is shown with a green line for comparison, while gray and cyan diamonds come from Pannella et al. (2015). On the left y-axis, A₁₆₀₀ is shown using the β–A₁₆₀₀ conversion of Meurer et al. (1999).