$\left(2,\ 1\right)$  

 $\left(1,\ 3\right)$  

 $\left(2,\ 5\right)$  

 $\left(3,\ 2\right)$  

 $\left(3,\ -4\right)$  

 $\left(3,\ 4\right)$  

 $\left(-3,\ -4\right)$  

 $\left(-3,\ 4\right)$  

(1, -20)

(3, 0)

(-5, -2)

(10 , -9)

(-3, -2)

(5, -7)

(3, 9)

(-5, 4)

(-6, 1)

(1, -6)

No solution

Infinite solutions

(3, 1)

(1, 7)

(-3, 1)

(1, -7)

(2,-2)

(-3,1)

Infinitely many solutions

No solution

(4, -3)

(-1, -3)

(-4, -3)

(-4, 3)

(1, -4)

(1, 4)

(-4, -7)

(-7, -4)