Question

Persamaan garis yg melalui titik a(-2,1) dan b (3,4) adalah...

Answer 1

(4-1) : (3-(-2))
= 3 : 5
0.6

y= mx + c
4= 0.6 (3) + c
4= 1.8 + c
c= 4 - 1.8
c= 2.2 ( dua koma dua )

Answer 2

Misal : X1 = -2, Y1= 1
X2=3,Y2=4
Rumusnya : Y-Y1/Y2-Y1 = X-X1/X2-X1
 Y-1/4-1= X-(-2)/3-(-2)
Y-1/3 = X+2/ 3+2
Y-1/3 = X+2/5
5(Y-1)=3(X+2)
5Y-5=3X+6
3X-5Y = -5-6
3X-5Y=-11