Posted by **Carmin** on Monday, June 29, 2009 at 10:01pm.

At the beginning of George’s diet, he weighed 212 pounds, and 8 weeks later he weighed 198 pounds. Find the average rate of change of George’s weight.

I think its 1.75 but also -1.75? which one could it be? Please help! Thanks!

- Algebra -
**Ms. Sue**, Monday, June 29, 2009 at 10:08pm
212 - 198 = 14

14 / 8 = 1.75 -- so he lost an average of 1.75 pounds per week. That's about 0.8% of his original weight.

- Algebra -
**Carmin**, Monday, June 29, 2009 at 10:10pm
Yea but they are looking for the rate of change. Wouldn't that be a negative number?

- Algebra -
**MathMate**, Tuesday, June 30, 2009 at 6:59am
Yes, the rate of change is -1.75 pounds per week. The negative sign is implied in the expression **lost** an average of 1.75 pounds per week.

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