how does the demand curve faced by a purely monopolistic seller differ from that confronting a purely competitive firm? the demand curve faced by a purely monopolistic seller is multiple choice 1 perfectly inelastic, whereas that facing the purely competitive firm is perfectly elastic. downward sloping, whereas that facing the purely competitive firm is perfectly inelastic. downward sloping, whereas that facing the purely competitive firm is perfectly elastic. perfectly elastic, whereas that facing the purely competitive firm is perfectly inelastic.