Line ef is the median of the trapezoid abcd. the median connects the midpoint of the legs of a trapezoid. use the diagram to find the lengths of the median and base.

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.