Does the relation {(5,-2), (5,-8), (4,-6), (7,-1)} represent a function?

Which statement most accurately describe why the division property of exponents does not apply to the expression (-8)^2/(-3)^4

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your