Sherlock wants to rent a textbook. he has to pay a fixed base cost plus a daily rate for renting the textbook. the table shows the amount of money, y, in dollars, that sherlock has to pay for renting the textbook for x days:

textbook rental

number of days
(x) rent (dollars)
(y)
0 6
1 13
2 20
3 27
4 34

which equation best shows the relationship between x and y?
y = x + 13
y = 7x + 13
y = x + 6
y = 7x + 6