Charlotte has been working for her company for x years. The number of years Travis has been working for the same company, y years, is exactly 3 years longer than Charlotte.

What is the range of the relationship between x and y?

A.
y ≥ 0
B.
y ≥ 3
C.
y ≤ 3
D.
0 ≤ y ≤ 3

1 answer

According to the information given, Travis's years of service \(y\) is exactly 3 years longer than Charlotte's years of service \(x\). This can be expressed with the equation:

\[ y = x + 3 \]

Here, we also know that:

  • \(x\) represents the number of years Charlotte has worked, which cannot be negative. So, \(x \geq 0\).
  • Since \(y\) is calculated as \(x + 3\), and \(x\) is non-negative, this implies that \(y\) is at least 3 (when \(x = 0\)).

Hence:

  1. If \(x = 0\), then \(y = 0 + 3 = 3\).
  2. If \(x = 1\), then \(y = 1 + 3 = 4\).
  3. If \(x = 2\), then \(y = 2 + 3 = 5\).
  4. If \(x = x\), then \(y = x + 3\) continues to increase as \(x\) increases.

Thus, \(y\) can take any value that is equal to or greater than 3 when \(x\) is equal to or greater than 0.

The relationship can be summarized as:

\[ y \geq 3 \]

Therefore, the correct answer is:

B. \(y \geq 3\).