( ( Bar ( ( graphs and ) Histograms ) ) ( ( use ( rectangles ( to ( show ( ( the ( ( number or ) percent ) ) ( in ( each interval ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Bar) (NNS graphs) (CC and) (NNS Histograms)) (VP (VBP use) (S (NP (NNS rectangles)) (VP (TO to) (VP (VB show) (NP (NP (DT the) (NN number) (CC or) (NN percent)) (PP (IN in) (NP (DT each) (NN interval)))))))) (. .)))
Bar graphs and Histograms use rectangles to show the number or percent in each interval.
(ROOT (S (NP (NNP Circle) (NNS graphs)) (VP (VBP are) (ADJP (JJ useful) (PP (IN for) (S (VP (VBG showing) (NP (NP (NNS percents)) (PP (IN of) (NP (DT a) (NN whole))))))))) (. .)))