Materi : Persamaan Garis Lurus
y = 2x + 3 [ m = 2 ]
Titik ( x¹ = 5, y¹ = 6 )
Ket : Sejajar ( m )
_______________/
y - y¹ = m( x - x¹ )
y - 5 = 2( x - 6 )
y - 5 = 2x - 12
2x - y = 7
y = ½x + 6 [ m = ½ ]
Titik ( x¹ = -1, y¹ = 4 )
Ket : Tegak Lurus ( -1/m )
y - y¹ = ( -1/m )( x - x¹ )
y - 4 = ( -1/½ )( x + 1 )
y - 4 = - 2( x + 1 )
y - 4 = - 2x - 2
2x + y = 2
Titik ( x¹ = 3, y¹ = 4 )
Titik ( x² = 1, y² = 3 )
---
( y - y¹ )/( y² - y¹ ) = ( x - x¹ )/( x² - x¹ )
( y - 4 )/( 3 - 4 ) = ( x - 3 )/( 1 - 3 )
( y - 4 )/(-1) = ( x - 3 )/(-2)
- 2( y - 4 ) = - ( x - 3 )
- 2y + 8 = - x + 3
x - 2y + 5 = 0
Semoga bisa membantu
[tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
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Materi : Persamaan Garis Lurus
Soal Nomor 1
y = 2x + 3 [ m = 2 ]
Titik ( x¹ = 5, y¹ = 6 )
Ket : Sejajar ( m )
_______________/
y - y¹ = m( x - x¹ )
y - 5 = 2( x - 6 )
y - 5 = 2x - 12
2x - y = 7
Soal Nomor 2
y = ½x + 6 [ m = ½ ]
Titik ( x¹ = -1, y¹ = 4 )
Ket : Tegak Lurus ( -1/m )
y - y¹ = ( -1/m )( x - x¹ )
y - 4 = ( -1/½ )( x + 1 )
y - 4 = - 2( x + 1 )
y - 4 = - 2x - 2
2x + y = 2
Soal Nomor 3
Titik ( x¹ = 3, y¹ = 4 )
Titik ( x² = 1, y² = 3 )
---
( y - y¹ )/( y² - y¹ ) = ( x - x¹ )/( x² - x¹ )
( y - 4 )/( 3 - 4 ) = ( x - 3 )/( 1 - 3 )
( y - 4 )/(-1) = ( x - 3 )/(-2)
- 2( y - 4 ) = - ( x - 3 )
- 2y + 8 = - x + 3
x - 2y + 5 = 0
---
Semoga bisa membantu
[tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\: BLUEBRAXGEOMETRY}}}} [/tex]