Final answer:
To constrain the production of 4-cylinder connecting rods to 0 or 7,000 units, a linear constraint x4 <= 7000 * s4 can be used, where x4 is the number of rods and s4 is a binary setup variable.
Step-by-step explanation:
The student is asking for help in formulating a linear constraint concerning the production of 4-cylinder connecting rods based on given decision variables. Using x₄ to represent the number of 4-cylinder connecting rods and s₄ as the binary setup variable, the constraint to ensure that next week's production is limited to either 0 or 7,000 units is:
x₄ ≤ 7000 * s₄
This constraint indicates that if the production line is set up for 4-cylinder connecting rods (s₄ = 1), then x₄ can be as many as 7,000 units. If not (s₄ = 0), then x₄ must be 0