Hatch marks or hash marks are used to show that segments are congruent
Step-by-step explanation:
On any geometric figure, the congruency is denoted by hatch marks or hash marks.
For example - the notation to show the congruent sides of a triangle is done by using small tick marks, that show that the two sides are the same length or congruent.
The two coordinates' x variables are the same, while the y variables change. This means that it is reflected over the x axis. Reflecting over the y axis would cause a change in the x variable, as it would have to move sideways, so this can't be the case since the x variable stays as 4 even after the reflection.
