Final answer:
The equation representing the relationship between the number of t-shirts ordered, the number of colors on the shirts, and the total cost of the order is C = 2N + 50M.
Step-by-step explanation:
We can represent the total cost of the order as a linear equation. Let's use the variable C to represent the total cost, N to represent the number of t-shirts ordered, and M to represent the number of colors on the shirts. The cost of each shirt is $2, and the cost for each color is $50. So the equation can be written as:
C = 2N + 50M
This equation expresses the relationship between the number of t-shirts ordered, the number of colors on the shirts, and the total cost of the order.