You began membership in a new health and fitness club which has access to a dietician and personal trainer. They help you develop a special eight-week diet and exercise program. The data in the following table represents your weight, w, as a function of time, t, over an eight-week period. Time (weeks)
0
1
2
3
4
5
6
7
8
Weight (lb)
150
144
143
141
140
137
137
132
129

Your weight decreases during each of the first five weeks of the program. Determine the change in the t-value over the first five weeks; that is, from t = 0 to t = 5.
a.
The change in the t-value is -5.
b.
The change in the t-value is 5.
c.
The change in the t-value is 13.
d.
The change in the t-value is -13.