A2. Which equation represents a line?
(A) $x y=5$
(B) $\frac{2 x}{3}-1=3 y$
(C) $y=x^{2}-3$
(D) $3 x-y^{2}-1=0$
(E) $y=x^{\frac{1}{2}}$
A2. Among the given equations, the equation $\frac{2 x}{3}-1=3 y$ is linear and represents a line.