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Post on 13-Jul-2016
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DIKETAHUI :
M = Rp.120.000
Qy = 100 unit
Qx = 75 unit
a. Y = 𝑀
𝑃𝑦 -
𝑃𝑥
𝑃𝑦 x
Y = 120.000
600 -
800
600 x
Y = 200 - 4
3 x
Jika Y = 0 ; X = 150 (150 ; 0)
Jika X = 0 ; Y = 200 (0 ; 200)
𝐸0 = (75 ; 100)
b. ∆ Px = -25%
Px’ = 800 – 25% (800)
Px’ = 600
Persamaan Garis
Y’ = 𝑀
𝑃𝑦 –
𝑃𝑥′
𝑃𝑦 x
Y’ = 120.000
600 -
600
600 x
Y’ = 200 – X
Jika X = 0 ; Y = 200 (0 ; 200)
Jika Y = 0 ; X = 200 (200 ; 0)
∆ 𝑄𝑦 = 20 𝑢𝑛𝑖𝑡
𝑄𝑦′ = 100 + 20
Qy’ = 120 unit
Py = Rp.600
Px = Rp.800
Qx’ = 𝑀−𝑄𝑦′𝑃𝑦
𝑃𝑥′
Qx’ = 150.000 −120(600)
600
Qx’ = 80 unit
𝐸1 = (80 ; 120)
c. Termasuk barang normal karena harga turun permintaan barang meningkat.
Keadaan konsumen lebih baik karena E1 berada di sebelah kanan E0
d. Dik : ∆𝑀 = −15.000
M’ = 120.000 – 15.000
M’ = 105.000
Dik : ∆Py = -100
Py’ = 600 – 100 = 500
Dik : ∆Qy = 30 unit
Qy”= 120 + 30 = 150
Qx”= 𝑀 –𝑄𝑦"(𝑃𝑦′)
𝑃𝑥′
Qx”= 105.000 −150(500)
600
Qx”= 50 unit
Persamaan Garis
Y” = 𝑀′
𝑃𝑦′ –
𝑃𝑥′
𝑃𝑦′ x
Y” = 105000
500 –
600
500 x
Y” = 210 - 6
5 x
Jika X = 0 ; y = 210 (0 ; 210)
Jika Y = 0 ; x = 175 (175 ; 0)
𝐸2 = (50 ; 150)
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