Answer:
its the 4th answer
Step-by-step explanatio
i had a test with the same question, i promise its right :)
The change to the customer is £1.25
Answer:
The domain is all real numbers.
The function is always decreasing
Step-by-step explanation:
Assuming the given function is

for

Then f(x) is an exponential decay function.
This means that, the domain will be all real numbers.
The range will be y<0
The y-intercept is (0,-1)
There is no x-intercept.
The graph is a decreasing function.