Kak jainudin jawab ya soalnya buat lusa​

m = Δy/Δx

garis AB

m = -6/3 = -2

melalui titik (-1, -4)

persamaan garis AB

y – y1 = m(x  - x1)

y – (-4) = -2(x – (-1))

y + 4 = -2(x + 1)

y + 4 = -2x – 2

y = -2x – 2 – 4

y = -2x – 6

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Garis BC

m = 4/4 = 1

melalui titik (3, 0)

Persamaan garis BC

y – y1 = m(x – x1)

y – 0 = 1(x – 3)

y = x – 3

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Persamaan garis CD

x = 3

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Garis AD

m = 3/7

melalui titik (3, 5)

y – y1 = m(x – x1)

y – 5 = 3/7(x – 3)

7(y – 5) = 3(x – 3)

7y – 35 = 3x – 9

3x – 7y = -35 + 9

3x – 7y = -26