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9.1 GARIS LURUS
Standard pembelajaran 9.1.1
Noor Syamila binti Mohd
Apakah itu garis lurus ?
Kenapa perlu belajar tentang garis
lurus?
Imbas Kembali tajuk tingkatan 2(graf
fungsi)….
Nyatakan jenis graf
fungsi bagi setiap
rajah di atas
Graf Linear
Graf Salingan
Graf kubik
Graf kuadratik
STANDARD PEMBELAJARAN:
Membuat perkaitan antara persamaan y = mx + c, dengan kecerunan dan
pintasan-y, dan seterusnya membuat generalisasi tentang persamaan garis
lurus.
KRITERIA KEJAYAAN:
Menentukan kecerunan dan pintasan-y bagi garis lurus.
Menyatakan nilai x bagi garis lurus selari dengan paksi-y.
Menyatakan nilai y bagi garis lurus selari dengan paksi-x.
SP 9.1.1
PERSAMAAN GARIS LURUS
𝑦 = π‘šπ‘₯ + 𝑐 : ialah satu persamaan garis lurus dengan kecerunan, π‘š dan
pintasan-y , 𝑐.
π‘š =
𝑦2 βˆ’ 𝑦1
π‘₯2 βˆ’ π‘₯1
JENIS GRAF GARIS LURUS
Selari dengan
paksiβˆ’π’™ , π’š = 𝒉 𝒉
𝒉
Selari dengan
paksiβˆ’π’š , 𝒙 = 𝒉
KECERUNAN GARIS LURUS, π’Ž
Formula menentukan nilai kecerunan garis lurus,
π‘š = βˆ’
π‘—π‘Žπ‘Ÿπ‘Žπ‘˜ π‘šπ‘’π‘›π‘’π‘”π‘Žπ‘˜
π‘—π‘Žπ‘Ÿπ‘Žπ‘˜ π‘šπ‘’π‘›π‘”π‘’π‘“π‘’π‘˜
, π‘š =
𝑦2βˆ’π‘¦1
π‘₯2βˆ’π‘₯1
, π‘š = βˆ’
π‘π‘–π‘›π‘‘π‘Žπ‘ π‘Žπ‘›βˆ’π‘¦
π‘π‘–π‘›π‘‘π‘Žπ‘ π‘Žπ‘›βˆ’π‘₯
Pintasanβˆ’π’™ dan Pintasan βˆ’π²
Pintasanβˆ’π’™
Pintasanβˆ’π’š
Untuk mencari pintasan-y , masukkan 𝒙 = 𝟎 dalam persamaan garis lurus.
Untuk mencari pintasan-x , masukkan π’š = 𝟎 dalam persamaan garis lurus.
Contoh 1, m/s 229
Penyelesaia
n
Contoh 2, m/s 229
Penyelesaia
n
LATIHAN 1
1. Tentukan persamaan garis lurus bagi garis lurus di bawah
LATIHAN 2
2. Tentukan persamaan garis lurus bagi garis lurus di bawah
LATIHAN 3
3. Tentukan persamaan garis lurus bagi garis lurus di bawah
LATIHAN 4
4. Tentukan persamaan garis lurus bagi garis lurus di bawah
LATIHAN 5
5. Tentukan persamaan garis lurus bagi garis lurus di bawah
LATIHAN 6a
6. Tentukan persamaan garis lurus yang berikut dalam bentuk 𝑦 = π‘šπ‘₯ + 𝑐
a) Diberi kecerunan π‘š = 2 , dan π‘π‘–π‘›π‘‘π‘Žπ‘ π‘Žπ‘› βˆ’ 𝑦, 𝑐 = βˆ’5
LATIHAN 6b
6. Tentukan persamaan garis lurus yang berikut dalam bentuk 𝑦 = π‘šπ‘₯ + 𝑐
b) Diberi kecerunan π‘š =
2
3
, dan π‘π‘–π‘›π‘‘π‘Žπ‘ π‘Žπ‘› βˆ’ 𝑦, 𝑐 = 10

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Bab 9 garis lurus (9.1.1)

  • 1. 9.1 GARIS LURUS Standard pembelajaran 9.1.1 Noor Syamila binti Mohd
  • 2. Apakah itu garis lurus ? Kenapa perlu belajar tentang garis lurus?
  • 3. Imbas Kembali tajuk tingkatan 2(graf fungsi)…. Nyatakan jenis graf fungsi bagi setiap rajah di atas Graf Linear Graf Salingan Graf kubik Graf kuadratik
  • 4. STANDARD PEMBELAJARAN: Membuat perkaitan antara persamaan y = mx + c, dengan kecerunan dan pintasan-y, dan seterusnya membuat generalisasi tentang persamaan garis lurus. KRITERIA KEJAYAAN: Menentukan kecerunan dan pintasan-y bagi garis lurus. Menyatakan nilai x bagi garis lurus selari dengan paksi-y. Menyatakan nilai y bagi garis lurus selari dengan paksi-x. SP 9.1.1
  • 5. PERSAMAAN GARIS LURUS 𝑦 = π‘šπ‘₯ + 𝑐 : ialah satu persamaan garis lurus dengan kecerunan, π‘š dan pintasan-y , 𝑐. π‘š = 𝑦2 βˆ’ 𝑦1 π‘₯2 βˆ’ π‘₯1
  • 6. JENIS GRAF GARIS LURUS Selari dengan paksiβˆ’π’™ , π’š = 𝒉 𝒉 𝒉 Selari dengan paksiβˆ’π’š , 𝒙 = 𝒉
  • 7. KECERUNAN GARIS LURUS, π’Ž Formula menentukan nilai kecerunan garis lurus, π‘š = βˆ’ π‘—π‘Žπ‘Ÿπ‘Žπ‘˜ π‘šπ‘’π‘›π‘’π‘”π‘Žπ‘˜ π‘—π‘Žπ‘Ÿπ‘Žπ‘˜ π‘šπ‘’π‘›π‘”π‘’π‘“π‘’π‘˜ , π‘š = 𝑦2βˆ’π‘¦1 π‘₯2βˆ’π‘₯1 , π‘š = βˆ’ π‘π‘–π‘›π‘‘π‘Žπ‘ π‘Žπ‘›βˆ’π‘¦ π‘π‘–π‘›π‘‘π‘Žπ‘ π‘Žπ‘›βˆ’π‘₯
  • 8. Pintasanβˆ’π’™ dan Pintasan βˆ’π² Pintasanβˆ’π’™ Pintasanβˆ’π’š Untuk mencari pintasan-y , masukkan 𝒙 = 𝟎 dalam persamaan garis lurus. Untuk mencari pintasan-x , masukkan π’š = 𝟎 dalam persamaan garis lurus.
  • 9. Contoh 1, m/s 229 Penyelesaia n
  • 10. Contoh 2, m/s 229 Penyelesaia n
  • 11. LATIHAN 1 1. Tentukan persamaan garis lurus bagi garis lurus di bawah
  • 12. LATIHAN 2 2. Tentukan persamaan garis lurus bagi garis lurus di bawah
  • 13. LATIHAN 3 3. Tentukan persamaan garis lurus bagi garis lurus di bawah
  • 14. LATIHAN 4 4. Tentukan persamaan garis lurus bagi garis lurus di bawah
  • 15. LATIHAN 5 5. Tentukan persamaan garis lurus bagi garis lurus di bawah
  • 16. LATIHAN 6a 6. Tentukan persamaan garis lurus yang berikut dalam bentuk 𝑦 = π‘šπ‘₯ + 𝑐 a) Diberi kecerunan π‘š = 2 , dan π‘π‘–π‘›π‘‘π‘Žπ‘ π‘Žπ‘› βˆ’ 𝑦, 𝑐 = βˆ’5
  • 17. LATIHAN 6b 6. Tentukan persamaan garis lurus yang berikut dalam bentuk 𝑦 = π‘šπ‘₯ + 𝑐 b) Diberi kecerunan π‘š = 2 3 , dan π‘π‘–π‘›π‘‘π‘Žπ‘ π‘Žπ‘› βˆ’ 𝑦, 𝑐 = 10