Question

1. Persamaan garis yang melalui titik (9,-5) dan (2, 3) adalah
7y= -8x+5 , 7y= -8x+37 , 8y= -7x+5 , 8y= -7x+37
2. Sebuah garis melalui titik A(-5,7) dan tegak lurus garis 4y+x-1 =0 ,persamaan garisnya adalah
y= 4x-13 , y= 4x+13 , y= 4x-27 , y= 4x+27

Answer 1

-5-3=-8
1-2=7
-8/7=m
y-y1=m(x-x1)
y-9=-8/7(x+5)
y-9=-8/7x - 40/7
y=9-8/7-40/7

Answer 2

No 1

=

=

=

-7(y+5) = 8(x-9)
-7y-35 = 8x-72
-7y = 8x-72+35
-7y = 8x-37
-8x+37 = 7y

jawabnya b

no 2
4y+x-1 = 0
a = 1
b = 4

m1 =

m1 =

m2 =

m2 =

m2 =

m2 = 4

y-y1 = m2(x-x1)
y-7 = 4(x+5)
y-7 = 4x+20
y = 4x+20+7
y = 4x+27

jawabnya d