If we are at - 7 on the number line and move 9 units to the right, we would reach
2
If we are at - 7 on the number line and move 9 units to the right, we would reach +2.
Mathematically: Moving in the right direction on a number line is considered positive.
Hence, let's add 9 units to -7 to see where we reach.
⇒−7 + 9=+2
∴ On the number line, we reach at +2 position.