Garis
• cari gradien garis yg melalui (-7,-4) dan (5,-5)
m = (y1 - y2)/(x1 - x2)
m = (-4 + 5)/(-7 - 5)
m = -1/12
Persamaan garis dg m = -1/12 dan melalui (a,b) = (6,-4) :
y - b = m(x - a)
y + 4 = -1/12 (x - 6)
Kedua ruas kalikan 12
12y + 48 = -x + 6
x + 12y + 48 - 6 = 0
x + 12y + 42 = 0 ✔
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Garis
• cari gradien garis yg melalui (-7,-4) dan (5,-5)
m = (y1 - y2)/(x1 - x2)
m = (-4 + 5)/(-7 - 5)
m = -1/12
Persamaan garis dg m = -1/12 dan melalui (a,b) = (6,-4) :
y - b = m(x - a)
y + 4 = -1/12 (x - 6)
Kedua ruas kalikan 12
12y + 48 = -x + 6
x + 12y + 48 - 6 = 0
x + 12y + 42 = 0 ✔