What is the slope of the line for the cost of subs at sam's sub

5.5

Step-by-step explanation:

11 divided by 2 is 5.5

22 divided by 4 is 5.5

44 divided by 8 is 5.5

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

the function makes a strait line horizontally with no x intercept but a y intercept at 9.