Permintaan Qd=2.500-4p jika harga(p) barang S sebesar rp. 500 jenis permintaan barang bersifat....

P = 500
Q = 2500 - 4(500) = 2500 - 2000
= 500

e = Q' × P/Q
= 4 × 500/500
= 4
> 1 elastis

Qd = 2500 - 4P
P = 500
Qd = 2500 - 4(500)
Qd = 2500 - 2000
Qd = 500

Ep = Q` x P/Q
Ep = -4 x 500/500
Ep = |-4| = 4 (elastis)