When the temperature T (in degrees Celsius)of a certain laboratory animal is reduced,its heart rate r (in beats per minute)decreases.At a temperature of 37°C,the animal had a heart rate of 200,and at a temperature of
its heart rate was 140.If r is a linear function of T for 26 ≤ T ≤ 38,(a)determine this function and (b)determine the heart rate at a temperature of 30°C.

Question

When the temperature T (in degrees Celsius)of a certain laboratory animal is reduced,its heart rate r (in beats per minute)decreases.At a temperature of 37°C,the animal had a heart rate of 200,and at a temperature of  
its heart rate was 140.If r is a linear function of T for 26 ≤ T ≤ 38,(a)determine this function and (b)determine the heart rate at a temperature of 30°C.

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The Answer of When the temperature T (in degrees Celsius)of a certain laboratory animal is reduced,its heart rate r (in beats per minute)decreases.At a temperature of 37°C,the animal had a heart rate of 200,and at a temperature of  
its heart rate was 140.If r is a linear function of T for 26 ≤ T ≤ 38,(a)determine this function and (b)determine the heart rate at a temperature of 30°C.

When the Temperature T (In Degrees Celsius)of a Certain Laboratory