What is the maximum rate of change of the function: f(x, y) = 2x + 3y at (5, 5)? In which direction is this maximum achieved (enter a unit vector)? (Unless otherwise specified, always enter exact values, not a decimal approximation) The maximum rate of change is A unit vector in the direction of this rate of change is ( Check (3) Overview standard function logic vector abc unit ENG Search Th 2/4 y cloudy US F4F F5 FO FZ F8 FO F10 FI O Le Prt Sc Insert Delete O Backspace OC