Answer
$\sqrt[y] xx_{y}$ The constant factor leads to the constant increase from point-to-point. Reducing the constant factor will make less of an increase from point-to-point and thus will make the curve shallower.
Work Step by Step
To figure this out, notice that each point shown in Fig. 1.8 is 3 times greater (in y value) than the previous point. Use an imaginary lower constant factor: 2x. The data points would then be 2, 4, 8, 16, which is a shallower curve. You could graph this yourself if the point is not obvious in your imagination.
