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Verified answer
Y = f(x) = ax + bUntuk (-2,-5)
-5 = a(-2) + b
-5 = -2a + b
Untuk (-1,-2)
-2 = a(-1) + b
-2 = -a + b
-2a + b = -5
-a + b = -2
---------------- -
<=> -a = -3
<=> a = 3
-a + b = -2
b = a - 2
b = 3 - 2
b = 1
Jadi, f(x) = 3x + 1