Barney wants to rent a tent. He has to pay a fixed base cost plus a daily rate for renting the tent. The table shows the amount of money, y, in dollars, that Barney has to pay for renting the tent for x days:
Tent Rental
Number of days
(x) Rent (dollars)
(y)
0 3
1 8
2 13
3 18
4 23
Which equation best shows the relationship between x and y?