A point on the graph of
?
?
is moving along the curve in such a way that its x-coordinate is increasing at a rate of 2 units per second. At what rate is the y-coordinate decreasing at the instant the y-coordinate is equal to 5?
?
A. 5 units per second
B. 2.5 units per second
C. 25 units per second
D. 10 units per second
E. 2 units per second
Answer: D
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