Question

Ada yang bisa ?

1, y=3x
2. y=(-5x)-8
3. 2y=x+12
4. 2+4y=3x+5
5 tentukan garis yang melalui titik (2,-5) dan y=(-3x)+2
6 tentukan garis yang melalui titik (-3,5) dan 2x-3y=4

Answer 1

1. y = 3x maka m = 3
2. y = -5x - 8 maka m = -5
3. 2y = x+ 12
y = 1/2x + 6 maka m = 1/2

4) 2 +4y = 3x +5
4y = 3x + 5-2
4y = 3x + 3
y = 3/4x + 3/4 maka m = 3/4

5. y-y1 = m(x - x1)
y-(-5) = -3(x-2)
y+5= -3x + 6
y = -3x + 6 - 5
y = -3x - 1

6. y-y1= m(x - x1)
y-5 = 2/3(x + 3)
y-5 = 2/3x + 2
y = 2/3 + 2+5
y = 2/3 + 7

Tolong jawaban diatas dikoreksi kembali, jika ada kesalahan silakan dikomentar

Answer 2

1. bila x = 0    y = 3(0) = 0  , x = 1    y =3(1) = 3
     titik (0,0) , (1,3) , (2,6) , ... dst

2. bila x = 0    y = -5(0) - 8 = -8 , y = 0      0 = -5x - 8 | x = -8 : -5 = 1,6
     titik (0,-8) , (1,6;0) , (1,-13) , ... dst

3. bila x = 0    2y = 0 + 12 = 6, y = 0   0 = x + 12 | x = 0 - 12 = -12
     titik (0,6) , (-12,0) , (1;6,5) , ... dst

4. bila x = 0      2 + 4y = 0 + 5 | 4y = 5 - 2 | y = 0,75, y = 0   2 + 0 = 3x + 5 |
    x = 3 : (5 - 2) = 3 : -3 = 1
     titik (0;0,75) , (-1,0) , (1;1,5) , ... dst

5. bila x = 1    y = -3 + 2 = -1, x = 0    y = 0 + 2 = 2
     titik (2,-5) , (1,-1) , (0,2) , ... dst

6. bila x = 2   4 -3y=4 | y = (4 - 4) : -3 = 0 | x = 5   10 - 3y = 4 | y = (4 - 10) : -3       = 2
    titik (-3,5) , (2,0) , (5,2) , ... dst