Refer to the plots of Exercise 3-1 and determine graphically whether the following directions appear to be improving at the points indicated.

(a) x = 1 -3, 32 at x112 of 3-1(a)

(b) x = 10, 12 at x122 of 3-1(a)

(c) x = 1 -10, 12 at x132 of 3-1(a)

(d) x = 10, -32 at x122 in 3-2(b)

(e) x = 12, 22 at x132 in 3-2(b)

(f) x = 1 -1, -102 at x142 in 3-2(b)