Sally works as a sales representative for a laptop computer company. Each week, she earns a base salary. In addition, she receives a commission based on the number of laptops she sells. The table describes the linear relationship between the number of laptops she sells each week (x) and her weekly salary (y).
What is Sally's base salary, in dollars, each week?
A. $50
B. 120
C. $150
D. $170