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Si x = 0
y = -2(0) +4
y = 4
Si x = 1
y = -2(1) +4
y = -2 +4
y = 2
Si x= -1
y = -2(-1) +4
y = 2+4
y = 6
Si x= -2
y = -2( -2) +4
y = 4 + 4
y = 8
Si x = 2
y = -2(2) +4
y = - 4 + 4
y = 0
t
Tabla.
x 0 1 -1 -2 2
y 4 2 6 8 0