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3.)
nilai x1 = 0 dan nilai y1 = 1
nilai x2 = 2 dan nilai y2 = 0
Persamaan garisnya adalah
(y - 1) / (0 - 1) = (x - 0) / (2 - 0)
-(y - 1) = x/2
-2(y - 1) = x
-2y + 2 = x
x + 2y - 2 = 0
4.)
★ Mengubah Persamaan Garis Ke Bentuk y = mx + c
ax + 5y + c = 0
5y = - ax - c
y = -ax/5 - c/5
★ Mencari Nilai a
m = koefisien variabel x
m = -a/5
2 = -a/5
10 = -a
a = -10
★ Mensubstitusi nilai a = -10, nilai x = 2 dan nilai y = 3 ke persamaan garis ax + 5y + c = 0 untuk menghitung nilai c
(-10).(2) + 5.(3) + c = 0
-20 + 15 + c = 0
-5 + c = 0
c = 5
Jadi, nilai a = -10 dan nilai c = 5