Answer
See the picture.
Work Step by Step
Total: 50 states and Washington, DC = 51
The relative frequency for "0.00 - 0.49" is $\frac{7}{51}\approx0.1373$
The relative frequency for "0.50 - 0.99" is $\frac{14}{51}\approx0.2745$
The relative frequency for "1.00 - 1.49" is $\frac{7}{51}\approx0.1373$
The relative frequency for "1.50 - 1.99" is $\frac{8}{51}\approx0.1569$
The relative frequency for "2.00 - 2.49" is $\frac{6}{51}\approx0.1176$
The relative frequency for "2.50 - 2.99" is $\frac{4}{51}\approx0.0784$
The relative frequency for "3.00 - 3.49" is $\frac{4}{51}\approx0.0784$
The relative frequency for "3.50 - 3.99" is $\frac{0}{51}=0$
The relative frequency for "4.00 - 4.49" is $\frac{1}{51}\approx0.0196$
