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)012345678Weight (lb)150144143141140137137132129Your 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.
Answer
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.
Explanation
The change in t is the final time minus the starting time. From t = 0 to t = 5, the change is 5 − 0 = 5 weeks. Therefore, the correct choice is “The change in the t-value is 5.”
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