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: all real numbers
Range: {y|y ≤9}
Intercepts: (0, -4) , (8, 0) , (0, 2)
Symmetry: none

B) function
domain: {x|x ≤9}
range: all real numbers
intercepts: (-4, 0) , (0, 8) , (2, 0)
symmetry: y-axis

C) function
domain: all real numbers
Range: {y|y ≤9}
Intercepts: (-4, 0) , (0, 8) , (2, 0)
Symmetry: none

D) not a function