How do you know which is the x and which is the y Problem: Sarah can buy 6 cans of corn for $4.20. What is the constant of proportionality that relates, x, cans of corn, to y, money spent. (write in equation form)

It says in the problem that x is cans of corns and y is money spent so the equation is:

4.2=6

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8