Evaluate the function rule for the given value y = 15 – 3x for x = 3

To evaluate the function rule y = 15 – 3x when x = 3, we need to substitute the value of x into the equation.

Here’s how it works:

1. Start with the function: y = 15 – 3x.
2. Substitute 3 for x: y = 15 – 3(3).
3. Multiply: 3(3) = 9.
4. Now, the equation looks like: y = 15 – 9.
5. Subtract: 15 – 9 = 6.

So, when x = 3, the value of y is 6. Therefore, the evaluation of the function at this point gives us y = 6.