The table below shows the number of skateboards sold at a skate shop each week for five weeks.
w # of weeks 1 2 3 4 5
skateboards sold 22 44 66 88 110
Which equation represents the relationship between w, the number of weeks and s the number of skateboards sold?
s = 22w
s = 22/w
s = w/22
s - w = 22