## Elementary Geometry for College Students (6th Edition)

(a) $(5,-3,2)$ is a point on the line. (b) $\langle 1,2,-2 \rangle$ is a direction vector
$(x,y,z) = (5,-3,2)+n(1,2,-2)$ (a) We can find a point on the line: When we let $n=0$, $(x,y,z) = (5,-3,2)$ Therefore, $(5,-3,2)$ is a point on the line. (b) We can let $n=1$ to find a direction vector: $\langle 1,2,-2 \rangle$ is a direction vector