Final answer:
The number of subscribers to the website increased by 75% annually as indicated by the exponent 1.75 in the function f(t) = 50(1.75)^t.
Step-by-step explanation:
The student is provided with the function f(t) = 50(1.75)^t, which indicates the number of subscribers to a website after t years. The function represents exponential growth, where the base of the exponent, 1.75, indicates the rate of increase each year. Since 1.75 can be thought of as 175%, the number indicates an increase of 75% over the initial amount each year; that is 1.00 (the initial 100%) + 0.75 (the increase). This means that the conclusion about the number of subscribers to the website is that they increased by 75% annually.