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jmc

prealgebra junior

Problem

The graph relates the distance traveled [in miles] to the time elapsed [in hours] on a trip taken by an experimental airplane. During which hour was the average speed of this airplane the largest?
problem
(A)
(B)
(C)
(D)
Solution
The time when the average speed is greatest is when the slope of the graph is steepest. This is in the second hour .
Final answer
B