Which of the following is parallel to
-axis?
(A)
(B)
(C)
(D) Both (A) and (C)
(E) None of the above
Any equation of the form
is parallel to
-axis and equation of the form
is parallel to
-axis where a is any real number.
Therefore,
is parallel to
-axis because it can be written as
.
and
are parallel to
-axis because they can be written as
and
respectively. We can show these equations on the graph as following:
Hence, the answer is (D).
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