If the function f (x) = -3x^3 + 7x, represents the movement of a whale in meters. What is the average rate of change of the whale for x = 1 second and x = 3 seconds? Label your answer.

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.