Final answer:
Let x represent the number of clients and y represent the amount of money. This means that for every 3 clients, he earns $500. Mark will make $3,500 for 21 clients.
Step-by-step explanation:
To graph the relationship between the number of clients Mark acquires and the amount of money he makes, we can use a linear equation.
Let x represent the number of clients and y represent the amount of money.
From the given information, we know that Mark makes $500 for every 3 clients.
This means that for every 3 clients, he earns $500.
We can set up a proportion to find the amount of money Mark will make for 21 clients:
3/500 = 21/y
Cross-multiplying, we get:
3y = 21*500
3y = 10500
Dividing both sides by 3, we get:
y = 3500
Therefore, Mark will make $3,500 for 21 clients.