A.$$69.6 \frac\text heartbeats\min $$B.71.75$\frac\text heartbeats \text min $C.71$\frac\text heartbeats\min $D.66$\frac\text heartbeats\min $

You are watching: A cardiac monitor is used to measure

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### Video Transcript

for problem number two and also Stuart eighth Edition, ar two point one. It says a cardiac monitor Eyes used to measure their heart price of a patience after surgery. It compiles the number of heartbeats after teen minutes when the data top top the table room graft. The steep of the tangent heat represents the heart rate and beats every minute. The monitor approximates this worth the slow-moving or the hard means by calculating the slope of a picket line. S o. Use the data given to estimate the patient's heart rate after forty two minutes, using the mystery line in between the points with the given values of tea. So let's pull up again. The table indigenous this problem showing you at every time is presented a thirty 6 minutes thirty minutes forty, fourty two and also forty for. It offers you the total amount that heartbeats the were measured. And also you're going to use this data together long together with this steep formula to calculation the heart rate. For this reason you take the difference in the heartbeat in between two set of points and also they divided by the difference in the time Onda. Again, the problem explains how this an approach of finding the soap is how you calculation the heart rate and beats permanence on. Us noticed the imparts A, B, C and D. The referral is always the same. It's t equates to forty two. For this reason this is the key reference because that calculating the heart rate. And also we I deserve to pull increase the spreadsheet and the spreadsheet has the data from this table here, and also it permits us to watch to figure out first the difference in the heartbeat between each of you, these points and the reference time. Forty two minutes. Because that's the a time that interest. We check out the distinction in heartbeats. We separated by the difference in time that's calculated from this table, and also this critical column offers us the slopes. For this reason for component A in between the time miss, thirty six minutes with time is forty 2 minutes. We view that there's a difference of four hundred eighteen heartbeats. Between those two totals. We understand that forty 2 is six minutes ~ thirty six. That's the distinction in the moment we division those 2 numbers, and also we gain the answer for Party, which is sixty nine suggest six, repeating that her pits permanent. We perform the same for thirty eight minutes, giving us seventy one allude seventy five beats every minute for party attending goes fourty minutes come get, the seventy one will certainly be allowed to value as the price at fourty minutes in part. See, finally, party is between t amounts to forty two minutes and also tickles forty 4 minutes. We view that the steep or the beats per minutes calculated, is sixty 6 beats every minute. On that. Those are the answers to Ports A, B, C and D. The last question asks united state where ours conclusions, because the point of the objective of this difficulty is, too, has to satisfy the patient's heart price after fourty forty two minutes. So this is the no an essential goal, and one technique is to take it the slope calculated before forty 2 minutes, the number closestly to forty two before which is at forty. And also then we additionally take the steep calculated after forty 2 minutes, simply right after in ~ forty 4 minutes, and we titty carriage of these two numbers. If we carry out that, us should be able to get an estimate for the beats per minute at forty two minutes. Therefore anyone sixty 6 is around two hundred and thirty 7 decried it. Right, too, gets united state a estimate of sixty allude five to win permanent, and that is ours conclusion the that is the heart rate at forty 2 minutes.