Plz helpppalkaskjshdjsnd i need this done by monday

Can someone answer this question? : )

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?