Tugas Akhir Modul 3 No 1

Perhatikan Grafik Keseimbangan Pasar berikut ini dan jawab pertanyaan di bawah:

Tentukan: a. Fungsi Supply (Penawaran) dan Fungsi Demand (Permintaan) berdasarkan Grafik tersebut!

HARGA (P)

JUMLAH YANG DIMINTA (Qd)

JUMLAH YANG DITAWARKAN (Qs)

200

70

30

300

60

40

400

50

50

500

40

60

600

30

70

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Fungsi Demand : 200 = 70a + b 300 = 60a + b _ _ -100 = 10a a = -100/10 a = - 10 200 = 70 (-10) + b 200 = -700 + b  b = 200 + 700  b = 900 Jadi fungsi permintaan (Demand) : P = -10 Qd + 900 Fungsi Penawaran (supply): 200 = 30a + b 300 = 40a + b _ -100 = -10a a = -100/-10 a = 10 200 = 30 (10) + b 200 = 300 + b  b = 200 - 300

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P = 10 Qs  –  100  100

 b.  Nilai Elastisitas Ela stisitas Permintaan Permi ntaan dan Penawa P enawaran ran berdasark be rdasarkan an Harga Har ga Keseimban Kes eimbangan gan pada pa da Grafik tersebut! Elastisitas Permintaan (Ed): Ed = (Q2-Q1/P2-P1) X P/Q = {(50-60)/(400-300)} X (400/50) = (-10/100) X 8 = -0,1 X 8 Ed = - 0,8 Elastisits Penawaran (Es): Es = {(Q2  –  Q1)  Q1) / (P2-P1)} x (P/Q) = {( 50  –  40)  40) / (400  –  300)}  300)} X (400/50) = ( 10 / 100 ) X 8 = 0,1 X 8 Es = 0, 8