One way to estimate your maximum heart rate is to subtract your age from 220. Enter a function to describe the relationship between maximum heart rate y and age x.

Maximum heart rate can be represented into a function as follows

let

x = age

y = Maximum heart rate

equation will be

y =220-x

for example if we take a person who is 50 years old then the maximum heart rate that person will have will be

y= 220 - 50

y = 170

This means that this is the average maximum number of times your heart should beat per minute while exercising.

b. b < 1 might be the correct answer