To simplify the expression, we can start by distributing the coefficients:
1/4 (14x - 10) -3 (2 1/2x - 1 1/2) = 7/2x - 5/2 - 15/2x + 9/2
Next, we can combine like terms:
= (-15/2x + 7/2x) + (-5/2 + 9/2)
= -8/2x + 4/2
= -4x + 2
Therefore, the expression 1/4 (14x - 10) -3 (2 1/2x - 1 1/2) is equivalent to -4x + 2. Answer choice D is correct.