Question

Buatlah persamaan garis yang melalui titik { 1.1 } dan { 2.4 }

Answer 1

Y-y1/y2-y1 = x-x1/x2-x1 
y-1/4-1 = x-1/2-1
y-1/3 = x-1/1 
dikali silang, jadi=
y-1=3x-3
y=3x-3+1
y=3x-2 

Answer 2

(y-y1)/(y2-y1)= (x-x1)/(x2-x1)
(y-1)/(4-1)=(x-1)/(2-1)
(y-1)/3=(x-1)/1
kali silang
(y-1)1=3(x-1)
y-1=3x-3
y=3x-3+1
y=3x-2