Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 10 - Review Exercises - Page 495: 38


(a) A direction vector is $(4,2,3)$ (b) $(x,y,z) = (-1,2,4)+n(4,2,3)$

Work Step by Step

(a) We can find a direction vector: $P_2-P_1 = (3,4,7) - (-1,2,4) = (4,2,3)$ A direction vector is $(4,2,3)$ (b) We can find an equation for this line: $(x,y,z) = (-1,2,4)+n(4,2,3)$, where $n$ is a real number
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