Use the contour diagram of f to decide if the specified directional derivative is positive, negative, or approximately zero. 2.4 1.6 1. At the point (-1,1) in the direction of 0.8 of (-i +3)/v2, -0.8...

Extracted text: Use the contour diagram of f to decide if the specified directional derivative is positive, negative, or approximately zero. 2.4 1.6 1. At the point (-1,1) in the direction of 0.8 of (-i +3)/v2, -0.8 v 2. At the point (0, –2) in the direction of -1.6 4.0 12.0 -2.4 (i – 2j)//5, -2.4 -1.6 -0.8 0.8 1.6 2.4 (Click graph to enlarge) ? 3. At the point (-2, 2) in the direction of i, 4. At the point (-1,1) in the direction of | (-i - 5)/v2, 5. At the point (0, 2) in the direction of j, 6. At the point (1,0) in the direction of - j, 12.0 10.0 12.0 10.0 10.0 8.0 10.0 12.0