-2 and -2 Two negatives added equal a positive.............. . . .. . . . . . .
ROC is often used when speaking about momentum, and it can generally be expressed as a ratio between a change in one variable relative to a corresponding change in another; graphically, the rate of change is represented by the slope of a line. The ROC is often illustrated by the Greek letter delta.
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10:4 because there are 10 dolphins and 4 whales
