which of the following relationships is a function

a.Domain Range B.y^2=x^2-3x+4

3 2

4 1

7

c.Domain Range C.y^2=2x^2

13 0

2 4

-1

a.Domain Range B.y^2=x^2-3x+4

3 2

4 1

7

c.Domain Range C.y^2=2x^2

13 0

2 4

-1