Find the domain of the function. \( f(x)=9(x-15) \) The domain of \( f(x) \) is (Type your answer in interval notation.)

The function \( f(x) = 9(x - 15) \) is a linear function, which means it doesn’t have any restrictions on the values that \( x \) can take. Thus, the domain is all real numbers. In interval notation, that is expressed as \( (-\infty, \infty) \). What's fun here is that this means you can plug in any number you like! Whether it’s 0, 1000, or even -15, \( f(x) \) will always yield a valid output. So really, you have infinite options for your input!