Jawaban:

. y = 4x + 9 --> m = 4

pers garis ..

y - y1 = m(x - x1)

y - 3 = 4(x + 5)

y - 3 = 4x + 20

y - 4x = 23

2. x - 2y + 6 = 0

- 2y = -x - 6

y = 1/2 x + 3 --> m = 1/2

pers garis

y - y1 = m(x - x1)

y - 2 = 1/2(x - 1)

y - 2 = 1/2x - 1/2

y - 1/2x = -1/2 + 2

y - 1/2x = 3/2 (x 2)

2y - x = 3

3. \begin{gathered}\frac{y - y _{1} }{y _{2} - y _{1} } = \frac{x - x_{1}}{ x_{2} - x_{1} } \\ \frac{y - 3}{5 - 3} = \frac{x - 4}{-2 - 4} \\ \frac{y - 3}{2} = \frac{x - 4}{-6} \\ -6(y - 3) = 2(x - 4) \\ -6y + 18 = 2x - 8 \\ -6y - 2x = -26 \\ 3y + x = 13\end{gathered}

y

2

−y

1

y−y

1

=

x

2

−x

1

x−x

1

5−3

y−3

=

−2−4

x−4

2

y−3

=

−6

x−4

−6(y−3)=2(x−4)

−6y+18=2x−8

−6y−2x=−26

3y+x=13

4. 2x - 3y = 5

-3y = -2x + 5

y = 2/3x - 5/3 --> m1 = -5/3

m1 . m2 = -1

-5/3 . m2 = -1

m2 = 3/5

Penjelasan dengan langkah-langkah:

semoga membantu