Is 0 the dividing point between positive and negative numbers? There is a question that says 0 is the dividing point between positive and negative numbers, right?

Yes, 0 is not only the smallest non positive number but also the largest non negative number less than the positive number. The number axis is the dividing point

Which pair is 0 the boundary between positive and negative numbers and 0 the boundary between positive and negative numbers?

Which pair is 0 the boundary between positive and negative numbers and 0 the boundary between positive and negative numbers?
0 is a non negative and non positive neutral number. 0 is greater than all negative numbers and less than all positive numbers
It's better to say "demarcation point", right!

The dot on the right side of the number axis represents a positive number, and the dot on the left side represents a negative number, right

On the number axis, from the origin, the number along the arrow direction is positive, and the number against the arrow direction is negative

Can the number axis be positive on the left and negative on the right

Yes, but remember to define the positive direction
Now we are learning one-dimensional number axis, and we will also learn two-dimensional, three-dimensional, and even high-dimensional coordinate systems in the future. At that time, we can not only "have positive numbers on the left and negative numbers on the right", but also "have negative numbers on the top and positive numbers on the bottom", or "have negative numbers on the front and positive numbers on the back"
Another way to understand it is to go around the back to see the standard number axis. Isn't it that the left side is a positive number and the right side is a negative number? It's the same as the clock on the glass table from top to bottom turns clockwise, while the clock from bottom to top turns counter clockwise~

Is 0 the dividing point between positive and negative numbers? There is a question that says 0 is the dividing point between positive and negative numbers, right?