The table below shows the total number of hours Jessica, Emily, and Trina each studied after a given number of weeks.
Weeks Jessica Emily Trina
2 5 5 5
4 10 10 10
8 20 15 20
10 40 20 25
One of the relationships between weeks and total hours studied is proportional.
Whose number of total hours studied is proportional to the number of weeks studied?
For the proportional relationship, write an equation to represent y , the total number of hours studied, in terms of x , the number of weeks.
Explain how you determined your equation.