Which functions has an inverse that ia also a function?

Which shows the image of rectangle abcd after the rotation (x, y) → (–y, x)?

For what is the measure of the angle at the top of the shed? a. multiplication of areas b. squaring of areas c. addition of areas d. division of areas

Jose is going to use a random number generator 500500 times. each time he uses it, he will get a 1, 2, 3,1,2,3, or 44.