Ara takes her pulse in order to determine her resting heart rate, measured in beats per minute (\text{bpm})(bpm)left parenthesis, start text, b, p, m, end text, right parenthesis. She takes it for three minutes, and makes the following chart of the results. We'll assume that Tara's heart rate is constant over the three-minute period. Minutes 111 222 333 Beats 606060 120120120 180180180 Graph the proportional relationship described above, where the xxx-coordinate represents minutes, and the yyy-coordinate represents beats.