A linear function is when a variable y varies directly with a variable x. That is, when y increases, x also increases and the opposite is also true. THerefore, the correct answer from the choices listed above is the first option. Every day, the number of bacteria in the dish is 3 times what it was the previous day can be <span>represented by a linear function.</span>
Our P = 100, r = .08, n = 1 (annually means once a year), and t = 15. Filling in accordingly, we have . Simplifying a bit gives us and . Raising that number inside the parenthesis to the 15th power gives us . Multiplying to finish means that A(t) = $317.22
. Simplifying a bit gives us 
and 
. Raising that number inside the parenthesis to the 15th power gives us 
. Multiplying to finish means that A(t) = $317.22