for more examples go  HERE

`:=`(x1, [9, 11, 13, 17, 19]); 1
[9, 11, 13, 17, 19]
`:=`(x2, [12, 14, 16, 18, 20]); 1
[12, 14, 16, 18, 20]
`:=`(y1, [1, 2, 3, 4, 5]); 1
[1, 2, 3, 4, 5]
with(plots); -1
display(pointplot([seq([x1[i], y1[i]], i = 1 .. nops(y1))], axes = boxed, color = red), pointplot([seq([x2[i], y1[i]], i = 1 .. nops(y1))], axes = boxed, color = blue))
display(pointplot([seq([x1[i], y1[i]], i = 1 .. nops(y1))], axes = boxed, color = red), pointplot([seq([x2[i], y1[i]], i = 1 .. nops(y1))], axes = boxed, color = blue))
display(pointplot([seq([x1[i], y1[i]], i = 1 .. nops(y1))], axes = boxed, color = red), pointplot([seq([x2[i], y1[i]], i = 1 .. nops(y1))], axes = boxed, color = blue))
Plot_2d