Emily sells ice cream bars at the beach. In addition to a fixed salary, she earns a commission for each ice cream bar she sells. The table shows Emily's total earnings, y, from selling x bars of ice cream: Ice Cream Sales and Earnings
Number of Bars Sold (x)
Total Earnings (dollars) (y)
0
30
1
33
2
36
3
39

Which equation best shows the relationship between x and y?
y = x + 36
y = 3x + 36
y = x + 30
y = 3x + 30