If the function is one-to-one, find its inverse. If not, write "not one-to-one."{(-2, 4), (2, -4), (8, -2), (-8, 2)}
A. {(4, -2), (-4, 2), (-2, -8), (2, 8)}
B. {(4, -2), (-4, 2), (8, -2), (2, -8)}
C. {(4, -2), (-4, 2), (-2, 8), (2, -8)}
D. not one-to-one
Answer: C
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Find the impedance, Z, when the voltage is 
and current is I = -9i amperes.
A. 
ohms
B. 
ohms
C. 
ohms
D. 
ohms