Matching Exercise
Match the graph with the vector field. Here are the four possible vector fields:
F1 (x, y) = h−1/2, −xi
F2 (x, y) = hy, xi
F3 (x, y) = hcos(x + y), xi
F4 (x, y) = hx, −yi
1 SOLUTION: The functions are, in order:
F2 (x, y) = hy, xi
F4 (x, y) = hx, −yi
F3 (x, y) = hcos(x+y), xi
2
F1 (x, y) = h−1/2, −xi