Final answer:
Yes, to find f(-3), you need to substitute -3 for x in the equation for f(x) and then solve for the resulting value.
Step-by-step explanation:
To answer the question: To find f(-3), do we simply substitute -3 for x in the equation for f(x)? Yes, that is indeed the case. To evaluate a function for a particular x-value, you simply replace x with that value. For example, if you have an equation y = 9 + 3x and you want to find the value when x is -3, you would substitute -3 into the equation and solve: y = 9 + 3(-3) = 9 - 9 = 0. Similarly, when you have a function f(x), to find f(-3), you would replace every instance of x in the function's equation with -3 and then carefully perform the operations to solve.