Question

question 5
define a ray on line m in the direction of c.
a b c
m
→
ac
→
bc
←
cb
→
ca

Explanation:

A ray is a part of a line that has one endpoint and extends infinitely in one direction. To define a ray on line m in the direction of C, we need a ray that starts from a point on the line and goes towards C. $\overrightarrow{AC}$ starts from A and goes towards C, $\overrightarrow{BC}$ starts from B and goes towards C. $\overleftarrow{CB}$ is in the opposite - direction of C and $\overrightarrow{CA}$ is also in the opposite - direction of C.

Answer:

A. $\overrightarrow{AC}$, B. $\overrightarrow{BC}$