The techniques of shrinking the horizontal axis or stretching the vertical axis have the effect of making the slope of the graph visually (but not numerically)steeper.

What single rate of discount would be equivalent to a series of 15% / 8% / 4%?

A) 48.0%
B) 27.0%
C) 24.9%
D) 9.99%
E) 21.4%