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What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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.

True or false? a circle could be circumscribed about the quadrilateral below.