What is a vector?
A quantity having direction as well as magnitude
What is convex combination?
the new vector must be within the vector space of the original two vectors
Multiplying two vectors to find the middle vector
D = αAB + βAC, α and β represent the real number that each vector will be multiplied by
α and b must both be greater than or equal to 0 and α + β = 1, so that D is within the vector space