Final answer:
The steepest line would be at Anne's Restaurant.
Step-by-step explanation:
The equation for the cost of subs at Anne's Restaurant is y=4.75x. The equation represents a linear relationship where the y-coordinate (cost of subs) is directly proportional to the x-coordinate (number of subs). The coefficient of x in the equation represents the slope of the line.
The steepest line will have the largest slope. In this case, since the coefficient of x for Anne's Restaurant is 4.75, Anne's line will have the steepest slope. This means that Anne's Restaurant has the highest increase in cost per sub compared to the other shops.
Learn more about cost of subs at different shops