Nim :11110045
1.A. Rumusnya: y – y1 = m (x-x1)
Y - 5 = 2 ( x -
( - 3)
Y – 5 = 2 x + 6
Y = 2x + 6 + 5
Y = 2x +
11 atau
Y - 2x = 11
2. a. 3x + 2y = 5
b. -4x + y = 10
Eliminasi
3x + 2y = 5
-4x + y = 10 x 2
3x + 2y = 5
-8x+2y=20 -
-11x = 25
X = 25
X =2,27
3x+2y=5
-8x + 2y =5
-8(2,27)+2y=5
-18,6+ 2y=5
2y =5-18,6
2y = 23.13/2
Y=11.565
Subsitusi
A : 3x+2y=5
2y = 5+3x
Y = (5 + 3x/2)