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1. The equation 2x + 5y = 9 can represent a. A scalar equation of a line in two-space b. A scalar equation of a line in three-space c. Neither a or b d. Both a and b 2. Which vector is not normal to the plane x + 2y -3z -4=0 ? a. [2,-3,4] b. [-1,-2,3] c. [2,4,-6] d. [3,6,-9] 3. The equivalent quadrant bearing of 210 is a. N30.W b. S30'E c. $30 W d. N30'E 4. Which does not exist for a line in three-space ? a. Vector equation b. Scalar equation c. Parametric equation d. a point and a direction vector 5. Given A(1, 3, -7) and B(0, 2, -4), the exact magnitude of ABis a. v147 b. 3 C. V11 d. 3.3 6. If u = [3, -4] and v = [6, k], and u is orthogonal to v , then the value of k is a. -8 b. 4.5 C. 8 d. -4.5