By January 8, the number of people that would have heard the rumor is 256.
The rate of growth of the people that hear the rumor is an exponential function.
The equation that represents exponential function is:
FV = P (1 + r)^n
1 x (1 + 1)^8 = 256
To learn more about expoential function, please check: https://brainly.com/question/18760477