Question

tentukan persamaan garis lurus yang melalui titik p(1,1) Q(5,5)

Answer 1

Y-y1/y2-y1 = x-x1/x2-x1
y-1/5-1 = x-1/5-1
y-1/4 = x-1/4
4(y-1) = 4(x-1)
y-1 = x-1
y = x

Answer 2

m = (y2-y1) / (x2-x1)
m = (5-1) / (5-1) = 1

y-y1=m (x-x1)
y-1=1(x-1)
y=x
y-x=0