I believe the correct answer from the choices listed above is option D. The points where the object is traveling at the greatest speed would be <span>between points A and B because that slope is the steepest. The slope of this graph indicates speed since it will have the units of distance per time. The steeper the line is , the greater the value of the slope which would mean faster speed.</span>
Rewrite the expression as

Factor 2a from the first two terms and 3b from the last two:

Factor a-2b

A mixed number and one and two-ninths.
Hope this helps! :D