Answer:
The graph of y = a·f(x) will compress (or shrink) vertically when |a| < 1.
Explanation:
A compression is a transformation that decreases the distance between corresponding points of a graph and a line.
A vertical compression (or shrink) by a factor of a , such that y = a·f(x), where 0 < a < 1. This means that when a is between 0 and 1, the parent graph tends to widen.
In the given problem where y = 0.1x², the a = 0.1, which made the graph wider. This represents the vertical shrink (toward the x-axis) by a factor of 0.1.