Is f strictly decreasing on the interval (0,1)?

What is the average rate of change for this function for the interval from x=2 to x=4 ?

During your cycling trip, you and your friends often stayed in hostels. the prices of these are listed below. hostel standard room (price per night) with breakfast (price per night) super sleep hostels £22.45 £28.65 normandy nights £18.55 £25 zzzola hostels £24.50 £30.99 belgian beds £11.20 £18.55 night-time rest days ? £33 what is the range in cost for a single night, including both standard room prices and with breakfast prices?

Which of the following shows the length of the third side, in inches, of the triangle below