Question

P is a point on the cartesian plane. P' is its refection over positive x axis. Find the distance between these two points.

• A. 0.0
• B. 3
• C. 6
• D. 9

Answer 1

The correct option is C 6


We can observe that PP' is a line parallel to Y axis, as their x coordinates are equal which is equal to 2.
$\therefore P{P}^{\prime }=|Y_2-Y_1|$
$\Rightarrow P{P}^{\prime }=|3-(-3)|$
$\Rightarrow P{P}^{\prime }=|3+3|$
$\Rightarrow P{P}^{\prime }=6units$