Final answer:
The method that would not be used for calculating beta is dividing the average stock price by the average market price.
Step-by-step explanation:
The method that would not be used for calculating beta is C) The average stock price divided by the average market price.
Beta is a measure of an asset's volatility in relation to the market. It measures the sensitivity of the asset's returns to changes in the market returns.
Options A, B, and D are all valid methods for calculating beta. Option A calculates beta using the correlation coefficient and the standard deviation of the stock and market returns. Option B calculates beta using the covariance between the stock and market returns. Option D calculates beta using the slope of a plot of stock returns versus market returns.
Therefore, the correct answer is C) The average stock price divided by the average market price.