Calculating Change in Velocity of Ball from E to S

[DrDanger]

Homework Statement

The initial velocity of a ball is 1.0 m/s East (E). The final velocity is 1.0 m/s South (S). The change in the velocity of the ball is?

Homework Equations

(x^2+y^2)^.5

The Attempt at a Solution

would it simply be 1.4 southeast?

 

[rl.bhat]

You are asked to find the change in the velocity, vf - vi. -vi points toward west. So the resultant velocity points towards...?

 

[DrDanger]

You are asked to find the change in the velocity, vf - vi. -vi points toward west. So the resultant velocity points towards...?

southwest?