20 ! the first five terms in a pattern are shown below. -0.5, -0.25, 0, 0.25, 0.5, . . if the pattern continues, which expression can be used to find the nth term? a) 0.75n - 1.25 b) -0.25n - 0.25 c) 0.25n - 0.75 d) -0.5n + 0.25