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For the set {1,1,2,4,5,6,7,8,10,} which would MOST be affected by adding a value of 25 to the data?
A. Mode
B. Median
C. Mean
D. There are no significant changes

False.  That's called a "multivalued" function.

Examples:

         y = √(25 - x²)          (a circle,centered at the origin, with radius = 5)    
                 -5 < x < 5 

         y = √(kx)                 (a parabola, on its side, with vertex at the origin
                x >= 0               and axis along the x-axis)