Answer
The vertical axis does not start at 0.
The reader will not be able to correctly compare the proportions given in the graph.
Work Step by Step
The height of the first bar (25 - 34): $\approx0.305-0.1=0.205$
The height of the last bar (55 - 64): $\approx0.170-0.1=0.070$
A reader might conclude that the proportion of people aged 25 to 34 years old not covered by any health insurance is about $\frac{0.205}{0.070}\approx2.9$ times the proportion of people aged 55 to 64 years old not covered by any health insurance.
