Which algebraic rule describes the 270° counter-clockwise rotation about the origin? a) (x, y) → (−x, y) b) (x, y) → (x, −y) c) (x, y) → (y, −x) d) (x, y) → (−y, x)

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Two sides of a right triangle measure 2 units and 4 units. what is the area of the square that shares a side with the third side of the triangle?

Given a = {(1, , 5)(6,4)}, b = {(2,0)(4, ,5)(0, 0)) and c = {(1, 1)(0, 2)(0, 3)(0, ,5)}, answer the following multiple choice question: from the list of sets a, b, and c, state the domain of set b. domain of set b: {0, 6,5} domain of set b: {2, 4,-4, 0} set b does not have a domain