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Hi I didn't post this in homework help, as I didn't feel my question belonged there. If it doesn't belong here, my apologies.

I recently took an exam and it turns out I got the first question wrong according to my professor. The problem states:

"In the diagram four vectors are represented by arrows in the xy plane. Each division represents 1 meter" "What is vector d?"

Because the problem stated it was in the XY plane I put the answer as <-3,4>, but my professor took off a point for not accounting for the z coordinate.

I'd like a second opinion please.

http://gyazo.com/b54c3535fd7fd5f95138e7af3e68d786.png [Broken]

I recently took an exam and it turns out I got the first question wrong according to my professor. The problem states:

"In the diagram four vectors are represented by arrows in the xy plane. Each division represents 1 meter" "What is vector d?"

Because the problem stated it was in the XY plane I put the answer as <-3,4>, but my professor took off a point for not accounting for the z coordinate.

I'd like a second opinion please.

http://gyazo.com/b54c3535fd7fd5f95138e7af3e68d786.png [Broken]

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