Jard I my courses ECON1540 R - Introductory Mathematical Economics ll (Winter 20222023) 1 Online Quizzes 5 : 2 (Feb. 3, 4:00pm) on 6 Suppose the gradient vector of the two-variable function f at the point (x,y) ~_. . (3,2) is given by Ed Vf(7, 12) = (13.4,-3.9) I out Select the correct statement(s), if any, among the statements below. C) a. if we travel on the tangent plane to the graph of the function at that point by increasing the x by 1 and increasing the y by 2, the change in the value of 2 will be equal to 13.4+2[8.9). C} b. The partial derivative with respect to x is equal to #89. C) c. The partial derivative with respect to y is equal to -8.9. C) d. If we new! on the tangent plane to the graph of the function at that point by increasing the x by 'l and decreasing the y by 2, the change in the value of 2 will be equal to ~(13.4)+2(8.9). C) e. The partial derivative with respect to x is equal to 13.4. O f. The partial derivative with respect to y is equal to 13.4. Q g. None of the other statements is correct. 0 h. if we travel on the tangent plane to the graph of the function at that point by decreasing the x by 'l and decreasing the y by 2, the change in the value of 2 will be equal to 13.4-2(8.9). C] i. if we travel on the tangent plane to the graph of the function at that point by increasing the x by 1 and decreasing the y by 2, the change in the value of 2 will be equal to ~8.9-2(13.4)