Question

Tolong dijawab yah nomor 12 pakai caranya dan jangan ngasal

Answer 1

Melalui titik (2,3) dan (-1,4)
x₁= 2        y₁= 3
x₂= -1       y₂= 4

Cari gradiennya :
m₂= (y₂ - y₁) / (x₂ - x₁)
    = (4 - 3) / (-1 - 2)
    = 1 / -3
    = -1/3

y - y₁= m₂(x - x₁)
y - 3= -1/3(x - 2)
y - 3= -1/3x + 2/3
3y - 9= -x + 2
3y= -x + 2 + 9
3y= -x + 11
atau
x + 3y= 11 ( D )

Answer 2

M = y2-y1/x2-x1
    = 4-3/-1-2
    = 1/-3

y-y1 = m (x-x1)
y-3 = -1/3 (x-2)
y    = -1/3x + 2/3 +3
y    = -1/3x +2/3 + 9/3
y    = -1/3x + 11/3
3y   = -x + 11
x + 3y = 11

maaf kalau salah