V6 6. 13. The angle between the vectors u and v is 60°. Given that lul= 3 and |V= 4, the value of lu + v is: A. 13 B. 37 C. V13 D. V37 14. Jāl= 16. b= 10, and la+ b|= 14. The cosine of the angle between a and b is: -B. c. D 1 15. A vector equation of a line is given by r = i + 2j – 3k + (-i+j+k). Which of these points С. does not lie on the line ? A. (-2,5,0) B. (-1,3, -4) c. (5,–2, –7) D. (2, 1, –4) D. (2, 1, -4) | 68

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A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.