On Monday, stock XYZ opened at $8.84. On Friday, it closed at $10.12. What is the rate of change of stock XYZ for this particular week?

A. 10.1%

B. 8.9%

C. 1.2%

D. 12.2%

p = amount of change in price

p = (final amount) - (starting amount)

p = 10.12 - 8.84

p = 1.28

The stock increased by $1.28

Divide the value of p over the original amount 8.84

(amount of change) / (original amount) = p/8.84 = 1.28/8.84 = 0.144796

Convert 0.1447 to percent form to get 14.4796% which rounds to 14.5%

Unfortunately 14.5% isn't listed. I think your teacher made an typo when s/he made the problem.

13.2%