Determine Whether the Graph Is That of a Function

Determine whether the graph is that of a function. If it is, use the graph to find its domain and range, the intercepts, if any, and any symmetry with respect to the x-axis, the y-axis, or the origin.
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A) function
domain: {x|-7 ≤ x ≤7}
Range: {y|-7 ≤ y ≤ 7}
Intercepts: (-7, 0) , (0, -7) , (0, 0) , (0, 7) , (7, 0)
Symmetry: origin

B) function
domain: {x|-7 ≤ x ≤7}
range: {y|-7 ≤ y ≤ 7}
intercepts: (-7, 0) , (0, -7) , (0, 7) , (7, 0)
symmetry: x-axis, y-axis, origin

C) function
domain: {x|-7 ≤ x ≤7}
Range: {y|-7 ≤ y ≤ 7}
Intercepts: (-7, 0) , (0, -7) , (0, 7) , (7, 0)
Symmetry: x-axis, y-axis

D) not a function