Find the magnitude & direction of the vector JK given points J(-6,-4) & K(-10,-4).
a. 4 units; 0 degrees

b. 4 units; 180 degrees

c. 16 units; 0 degrees

d. 16 units; 180 degrees

Question

Find the magnitude & direction of the vector JK given points J(-6,-4) & K(-10,-4).
a. 4 units; 0 degrees 

b. 4 units; 180 degrees 

c. 16 units; 0 degrees 

d. 16 units; 180 degrees

perl · Answer

vector JK is the vector that starts at J and ends at K

perl · Answer

we can depict it with an arrow

anonymous · Answer

I know that the magnitude is 4 units but I don't know what the direction is  ?

perl · Answer

magnitude vector JK = magnitude vector ( K - J )

perl · Answer

|dw:1415125793524:dw|

perl · Answer

in math we usually measure angles counterclockwise from the x axis (east)

perl · Answer

|dw:1415125882606:dw|