Question

If point $p$ lies in first octant, then the sign of $x-$ coordinate will always be

• A. $+$
• B. $-$
• C. $x$ coordinate is always $0$
• D. $x$ coordinate can be $+$ or $-$

Answer 1

The correct option is A $+$

In the first octant, the values of x,y and z axes are positive.

Any point which lies in first octant has all their coordinate values as positive.

Since point $p$ lies in first octant, so, p will have all its coordinates as positive.

Hence, sign of $x$-coordinate will always be $+$.