Gardien garis dengan persamaan 2× + 4y + 4 =0

Bab Persamaan Garis
Matematika SMP Kelas VIII

ax + by + c = 0
m = -a/b

2x + 4y + 4 = 0
m = -2/4
m = -1/2

2× + 4y + 4 = 0
4y = -2× - 4
y = -2× - 4/4
y = -2×/ -1
y = 2×