Penjelasan dengan langkah-langkah:

persamaan garis..

a). titik (-2, -4) = (x1, y1)

titik (-4, 3) = (x2, y2)

..mencari nilai gradien (m)

m = (y2 - y1) /(x2 - x1)

m = (3 - (-4))/ (-4 - (-2))

m = (3 + 4)/(-4 + 2)

m = 7/(-2)

m = -7/2

...

menentukan persamaan garis..

y - y1 = m(x - x1)

y - (-4)) = -7/2(x - (-2))

y + 4 = -7/2(x + 2)

2(y + 4) = -7(x + 2)

2y + 8 = -7x - 14

2y + 8 + 7x + 14 = 0

7x + 2y + 22 = 0

7x + 2y = -22

..

Jawaban : C

...

b). titik (4,6) = (x1, y1)

titik (3,4) = (x1, y1) , titik (5,1) = (x2, y2)

maka, mencari nilai gradien nya :

m = (y2 - y1)/(x2 - x1)

m = (1 - 4)/(5 - 3)

m = -3/2

..

menentukan persamaan garis :

y - y1 = m(x - x1)

y - 6 = -3/2(x - 4)

2(y - 6) = -3(x - 4)

2y - 12 = -3x + 12

2y - 12 + 3x - 12 = 0

3x + 2y - 24 = 0.

3x + 2y = 24 ..

2y + 3x = 24

..

Jawaban : C