Question

Tolong dong yg nomor 18 sama caranya

Answer 1

Jika x = 0, maka y = -4
jika y = 0, maka x = -2

titik koordinatnya = (0, -4) dan (-2, 0)

y - y1 / y2 - y1 = x - x1 / x2 - x1

(=) y -(-4) / 0 -(-4) = x - 0 / -2 - 0
(=) y + 4 / 4 = x / -2
(=) -2y -8 = 4x
(=) -2y = 4x + 8
(=) 2y = -4x - 8
(=) y = -2x - 4

f (x) = -2x - 4

Answer 2

...x+...y=kpk dari 4 dan 2
4:-2x+4:-4y=4
-2x+(-y)=4
-y=2x+4/-1
y=-2x-4
f(×)=-2x-4