Before performing a bivariate regression analysis, a Pearson bivariate correlation was performed on the two variables. According to the output below, how much of the variance in the variable "ad cost" can be predicted by the variable "competitors"?

Correlations Ad cost competitors Pearson Ad cost 1.000 -.841 Correlation competitors -.841 1.000 Sig. (1-tailed) Ad cost .000 competitors .000 N Ad cost 27 27 competitors 27 27