Final answer:
Joe's weekly salary after x years can be represented by the equation: Salary = $550 + ($50 * (x - 1)).
Step-by-step explanation:
Joe's weekly salary after being employed for 2 years is $550. Each year, his weekly salary increases by $50. We can represent Joe's weekly salary after x years using the equation:
Salary = Initial Salary + (Yearly Increase * (Years - 1))
Substituting the values, we get:
Salary = $550 + ($50 * (x - 1))