Why "agreed" was used here? Shouldn't it be "agree"?
Native speaker’s answer
Rebecca
The word "agreed" in this case is the adjective form of "agree". So "agreed" means that something was already accepted or decided. The adjective form "agreed" is therefore used to indicate a decision or an agreement that has been made. Ex: We're leaving town at 9 am tomorrow. Agreed? Ex: A: This weather is nice. B: Agreed!