A visual display is introduced that enables one to compare the predictive validities of all possible non-negatively weighted sums of two predictors. This two-predictor validity curve assesses the level of predictability of a criterion from composites of two predictors. Derivations are presented for the general case. For illustrative purposes, the two predictors are given as the SAT-Verbal (V) and the SAT-Mathematics (M), and the criterion of interest is the first year college grade point average (FYA). The two-predictor validity curve allows one to assess the relative importance of SAT-V in relation to SAT-M for predicting FYA. Since each display takes up only a small amount of space, it is possible to pack nine on a page, which allows the user to examine these questions in the context of consistency over time, gender or other relevant classification variables. Illustrations are presented using SAT data from 1977 through 1981. (PN)