How can collecting data answer questions

In the final round of trivia competition, contestants were asked to name as many states that begin with the letter m as they could in 15 seconds. the bar graph shows the number of states the contestants were able to name. how many contestants participated in the final round of the competition?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.