Answer:
A
Explanation:
In Column A, the pattern is 1², 2², 3², etc. So x(t) = t², which is quadratic.
In Column B, the pattern is 2*1, 2*2, 2*3, etc. So x(t) = 2t, which is linear.
In Column C, the pattern is 9*1, 9*2, 9*3, etc. So x(t) = 9t, which is linear.
In Column D, the pattern is 1/1, 1/2, 1/3, etc. So x(t) = 1/t, which is reciprocal.
In Column E, the pattern is 1/1², 1/2², 1/3², etc. So x(t) = 1/t², which is reciprocal.
