Bivariate data often arises from the use of two different techniques to measure the same quantity. As an example, the accompanying observations on

x= hydrogen concentration (ppm)

using a gas chromatography method and

y= concentration

using a new sensor method were read from a graph in an article.

x	46	63	65	70	70	77	94	100	114	118	124	127	140	140	140	150	152	164	198	221
y	39	62	52	68	85	79	93	106	117	116	127	114	134	139	142	170	149	154	200	215

Construct a scatterplot.

Does there appear to be a very strong relationship between the two types of concentration measurements? Do the two methods appear to be measuring roughly the same quantity? Explain your reasoning.The points fall very close to a quadratic line withx-intercepts of approximately 0 and 225. This suggests that the two methods are producing substantially different concentration measurements.The points fall very close to a straight line with any-intercept of approximately 225 and a slope of about1. This suggests that the two methods are producing substantially the same concentration measurements. The points fall very close to a straight line with anx-intercept of approximately 0 and a slope of about 1. This suggests that the two methods are producing substantially the same concentration measurements.The points fall very close to a straight line with any-intercept of approximately 125 and a slope of about 0. This suggests that the two methods are producing substantially the same concentration measurements.The points fall very close to a quadratic line withx-intercepts of approximately 0 and 225. This suggests that the two methods are producing substantially the same concentration measurements.