#### Answer

(a) The point $(6,2)$ does not lie on the graph.
(b) The point $(-2,3)$ does not lie on the graph.

#### Work Step by Step

(a) We can verify if the point $(6,2)$ satisfies the equation of the graph:
$3x-2y = 3(6)-2(2) = 18-4 = 14$
The point $(6,2)$ does not lie on the graph.
(b) We can verify if the point $(-2,3)$ satisfies the equation of the graph:
$3x-2y = 3(-2)-2(3) = -6-6 = -12$
The point $(-2,3)$ does not lie on the graph.