Question

The image of the point $(1,3,4)$ with respect to the $xz$-plane is

• A. $(-1,3,4)$
• B. $(1,-3,4)$
• C. $(-1,-3,-4)$
• D. $(-1,3,-4)$

Answer 1

The correct option is B $(1,-3,4)$

Reflection of the point $(1,3,4)$ in the $xz$-plane will only change the sign of $y$-coordinate.
$x\text{and}z$ coordinate will remain same.
Therefore, the image of $(1,3,4)$ is$(1,-3,4).$