The points$(0,1), (-2,3), (6,7), (8,3)$ form

$(0, 1)$ $(-2, 3)$ $(6, 7)$ $(5, 3)$

$A$ $B$ $C$ $D$

$AB=\sqrt{(-2)^{2}+(-3-1)^{2}}=2\sqrt{2}$

$BC=\sqrt{(6+2)^{2}+(7-3)^{2}}=4\sqrt{5}$

$CD=\sqrt{2^{2}+4^{2}}=2\sqrt{5}$

$DA=\sqrt{8^{2}+2^{2}}=2\sqrt{17}$

$AC=\sqrt{6^{2}+6^{2}}=2\sqrt{6}$

$BD=\sqrt{10^{2}}=10$

Neither of the sides are equal. then this is a general quadrilateral