The ratio of the percent of the voters who voted against Hall (55%) to the percent who voted for him (45%) is the same as that of the number of the voters who voted against Hall (an unknown number we will call ) to the number who voted for him (8,488). From the information in the graph, setting  to the number of votes for Franklin,

.

Multiply both sides by 8,488 and solve:

The closest estimate is 10,400 votes.

Let's look at the pie chart.

We can see it represents the percentage of students in each class. The legend on the right displays which color represents which class:

blue=Math

orange=Science

gray=Art

yellow=History

So, we will look at the percentages and find the smallest/lowest number. We see it is 19% and it is the yellow class. We know yellow represents History.

Therefore, History has the lowest percentage of students.

Let's look at the pie chart:

We can see the legend on the right show which color represents which topping.

blue=Pepperoni

orange=Beef

gray=Sausage

yellow=Cheese

Now, we need to find the topping that people like the least. To do that, we will find the portion of the pie chart with the lowest percentage. We can see it is the orange portion with 12%. 

Now, we know the orange portion corresponds to Beef.

Therefore, the pizza topping that people like the least is beef.

Let's look at the pie chart

We can see each colored portion matches up with a class:

blue=Math

orange=Science

gray=Art

yellow=History

Now, to find the percentage of students in History, we will look at the portion that corresponds to History. We can see it is the yellow portion. We can also see it says 17%.

Therefore, the percentage of students in History class is 17%.

 of all of the students polled named math and history as their favorite subjects. Thus, we can just find the number of students that make up .

 students named math and science their favorite subjects.

The English and the Science sectors of the pie chart make up  of the entire chart. Thus, to find the central angle formed by the sum of these two sectors, we will need to find  of  degrees.

The central angle formed is .

From the chart, we can see that  of the school population is freshmen. Thus, we will need to find  of .

The sector labeled "Juniors" takes up  of the circle. Thus, its central angle must be  of , the number of total angles in a circle.

The central angle must be  degrees.

The juniors and seniors make up  of the school's population. Thus, we can find the number of juniors and seniors.

The freshmen and sophomores make up  of the school's population. Thus, we can find the number of freshmen and sophomores.

Subtract these two numbers to find how many more juniors and seniors there are than freshmen and sophomores.

There are  more juniors and seniors than there are freshmen and sophomores.

The question "Of the five schools, which school's median score improved the most from last year?" requires knowledge of last year's median math scores, which are not given by the graph. The other three questions only require knowledge of this year's scores, which are given.