The answer is going to be a fraction...which is 75/1000, otherwise known as 1/40
Answer:

Step-by-step explanation:
Take two points from the graph
(0,24) and (6,12)
Find the slope
The formula to calculate the slope between two points is equal to

substitute

---> is negative because is a decreasing function
Find the equation of the line in slope intercept form

we have

Note: The y-intercept is given (0,24)
substitute

Answer:
48 months
Step-by-step explanation:
12 times 4 48
The greatest common factor is six