Which of the following would increase blood pressure? low heart rate low blood volume dilated blood vessels constricted blood vessels

 If your heart rate is slow, that would also decrease blood pressure If a person has low blood volume, the heart would have to work a bit harder to circulate the blood through the body  If the blood vessels expand, that would decrease blood pressure - similar to if you were to turn your garden hose on - without a nozzle, or finger to restrict the flow of water [or blood ;)]  Using the example from above, if a blood vessel is restricted (like a garden hose with your thumb covering part of the opening), that largely increases the pressure