Question

Which of the following is the correct expression about the ordered pairs on the coordinate plane?

• A. (1, 2) = (2, 1)
• B. $(1,2)\ne (2,1)$

Answer 1

The correct option is B $(1,2)\ne (2,1)$

(1, 2) indicates that we have to move 1 unit along the x-axis and 2 units along the y-axis.



(2, 1) indicates that we have to move 2 units along the x-axis and 1 unit along the y-axis.


From the above graph, it is clear that the coordinates (1, 2) and (2, 1) are both different. Hence, (1, 2) is not equal to (2, 1).