Back to '5. Functions of several variables' Information The next four questions are about the surface z = x?y - 2ry? + 1. Flag question Question 5 The equation of the section cut by the plane : = 2 is Correct Mark 1.00 out Select one: of 3.00 O z =1 +4y + 4y2 Flag question O z = 2x2 - 8 + 1 0 2=1+4y - 4y2 O z=1 -8 -212 Clear my choice Check Correct Marks for this submission: 3.00/3.00. Accounting for previous tries, this gives 1.00/3.00. Question 6 The gradient of this section when y = 3 is Not complete Marked out of 3.00 Answer: P Flag question CheckQuestion 7 The equation of the section cut by the plane y = -1 is Not complete Marked out of Select one: 3.00 O z=1+2r -12 F Flag question O z=1-21-12 O z = 2y? +y+1 O z = 2y' -y+1 Check Question 8 The gradient of this section when r = 1 is? Not complete Marked out of 3.00 Flag Answer: question Check