The slope of a curved line differs from that of a straight line in that
A. the numerical value of the slope of a straight line is different at every point but is the same at every point for a curved line.
B. the numerical value of the slope of a straight line is always higher than the numerical value of the slope of a curved line.
C. the numerical value of the slope of a curved line is different at every point but is the same at every point for a straight line.
D. the numerical value of the slope of a curved line is an irrational number, but the numerical value of the slope of a straight line is always a rational number.
E. straight lines are more realistic, but curved lines are not descriptively accurate for the real world.
Answer: C
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