Question

Persamaan garis yang melalui titik (3,2) dan (4,1) adalah ?

Answer 1

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

y-y1= m(x-x1)
y-1 = -1 (x-4)
y-1 = -x+4
y + x - 5 = 0

Answer 2

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

y - y¹ = m(x-x¹)
y - 2 =-1(x-3)
y - 2 =-x+3
x+y = 5 atau
x+y-5=0