How do you evaluate the function rule y = 15 – 3x when x is equal to 3?

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

Here’s the step-by-step breakdown:

  1. Start with the original function: y = 15 – 3x.
  2. Substitute x with 3: y = 15 – 3(3).
  3. Now calculate 3(3): 3(3) = 9.
  4. Replace 3(3) in the equation: y = 15 – 9.
  5. Now perform the final calculation: y = 6.

So, after substituting x = 3 into the function, we find that the value of y is 6.

Therefore, the evaluated function rule for the given value is:

y = 6.

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