\(\eqalign{
& x = - 0,5 \Rightarrow y = {2 \over 3}.(-0,5) = {2 \over 3}.{-1 \over 2} = {-1 \over 3} \cr
& y = - 2 \Rightarrow - 2 = {2 \over 3}x \Rightarrow x = - 2:{2 \over 3} = \left( { - 2} \right).{3 \over 2} = - 3 \cr
& y = 0 \Rightarrow 0 = {2 \over 3}x \Rightarrow x = 0:{2 \over 3} = 0 \cr
& x = 4,5 \Rightarrow y = {2 \over 3}.4,5 = {2 \over 3}.{9 \over 2} = 3 \cr
& x = 9 \Rightarrow y = {2 \over 3}.9 = 6 \cr} \)
Ta được bảng sau:
\(x\)
\(-0,5\)
\(-3\)
\(0\)
\(4,5\)
\(9\)
\(y\)
\( - \dfrac{1}{3}\)
\(-2\)
\(0\)
\(3\)
\(6\)
