There is a proportional relationship between the number of months a person has had a streaming movie subscription and the total amount of money they have paid for the subscription. The cost for 6 months is \$47.94. The point \((6, 47.94)\) is shown on this graph:

Graph of a point on a coordinate plane, origin O. Horizontal axis, time (months), scale 0 to 22 by 2’s. Vertical axis, cost (dollars), scale 0 to 180 by 20’s. There is a point at (6 comma 47 point 94).

1. What is the constant of proportionality in this relationship?
2. What does the constant of proportionality tell us about the situation?
3. Add at least three more points to the graph and label them with their coordinates.
4. Write an equation that represents the relationship between \(C\), the total cost of the subscription, and \(m\), the number of months.

Select all the pieces of information that would tell you \(x\) and \(y\) have a proportional relationship. Let \(y\) represent the distance in meters between a rock and a turtle's current position and \(x\) represent the time in minutes the turtle has been moving.

What information do you need to know to write an equation relating two quantities that have a proportional relationship?