Describe two real-world quantities that have a proportional linear relationship. Explain how you could change the situation to make the relationship nonproportional.

Proportional: Mike, a plumber charges $5 per hour for his service.

Non-proportional: Mike charges a initial cost of $10 plus $3 for each hours of service.

Step-by-step explanation:

Let us assume that Mike, a plumber charges $5 per hour for his service.

So, the number of hours (h) of service and the total charge (C) are proportional, which is

C (h) = 5h ... (1)

If the condition changes like, Mike charges an initial cost of $10 plus $3 for each hour of service.

Here, the equation that models the situation is

C (h) = 10 + 3h ... (2)

Now, relation (1) is non-proportional. (Answer)