The diagram shows a plan for fencing off a section of a public park to make a dog park. A wall that separates the park from a highway will form one side of the dog park. The other 3 sides, shown as dotted lines, will be fenced. How much fencing is needed to make the dog park?

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.