Answer:
v = <-51, -54>
Step-by-step explanation:
The components of u can be determined by subtracting the initial point from the terminal point. Then the components of v will be -3 times those. The negative sign is there because the direction is opposite.
Many calculators can do some forms of vector arithmetic. Here, all we're doing is adding and subtracting, so treating each point and vector as a list works just fine.
u = <18-1, 6-(-12)> = <17, 18>
v = -3u = -3·<17, 18> = <-51, -54>
