please help in maths thanks!!!

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There was a stress test and a 25 year old at 170 heart beats per minute and a 55 year old had 140 heart beats per minute what is the linear equation?

Mar 5th, 2015

Use the point-slope equation for this line.

y-y0 = m(x-x0). let (x0, y0) be the point (55, 140). Slope m is delta(y)/delta(x) = -30/30 = -1.

Thus y-140 = -1(x-55), so y = -x + 195.

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Mar 5th, 2015

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