Arterial Blood Flow Medical evidence shows that a small change in the radius of an artery can indicate a large change in blood flow. For example, if one artery has a radius only 5% larger than another, the blood flow is 1.22 times as large. Increase in radius Times greater blood flow 5% 1.22 10% 1.46 15% 1.75 20% 2.07 (a) Use the average rate of change to estimate how many times greater the blood flow is in an artery that has a radius 12% larger than another. (b) Explain why if the radius is increased by 12% and then we increase the radius of the new artery by 12% again, the total increase in radius is 25.44%. (c) Use parts (a) and (b) to answer how many times greater is the blood flow rate in an artery that is 25.44% larger in radius than another? (d) Explain using average rate of change