y=f(x)=-0.85x+187,

While exercising, a person’s recommended target heart rate is a function of age.  The recommended number of beats per minute, y, is given by the function, y=f(x)=-0.85x+187, where x represents a person’s age in years. Determine the number of recommended heart beats per minute for your age. Show each step in the process of this calculation. 
Research the recommended amount of exercise (in minutes) that your target heart rate should be achieved and how many times per week.  What activity can you do this week to achieve this and how will you be able to measure your heart rate? Through a certain exercise machine, phone app, or fitness tracker? Provide a post of at least 200 words.
Read and respond to at least two students’ posts with at least 100 words each.