Your team is trying to develop a model to identify factors impacting blood pressure. They are considering the following parameters: age, weight, body surface area, duration of hypertension, and pulse. The team has collected some data and ran a correlation on their data to generate the correlation matrix shown below. You would like to build a regression model using your data.

If you decided to build a simple regression model to predict blood pressure, what variable would give you the best one-variable model?

	a.	Age
	b.	Weight
	c.	Body Surface Area
	d.	Duration of hypertension
	e.	Pulse

Blood pressure Age Weight Body surface Duration of area hypertension Pulse Correlation Matrix Age Weight Body surface area Duration of hypertension Pulse Stress 0.659 0.950 0.866 0.293 0.721 0.164 0.407 0.378 0.344 0.875 0.201 0.659 0.034 0.131 0.465 0.619 0.402 0.312 0.368 0.018 0.506 Blood pressure Age Weight Body surface Duration of area hypertension Pulse Correlation Matrix Age Weight Body surface area Duration of hypertension Pulse Stress 0.659 0.950 0.866 0.293 0.721 0.164 0.407 0.378 0.344 0.875 0.201 0.659 0.034 0.131 0.465 0.619 0.402 0.312 0.368 0.018 0.506