Atypical 35 year old man as a has an age adjusted maximum heart rate of 185 bpm (beats per minute). to maintain top conditioning and athletes should exercise so that his or her heart rate is between 80% and 90% of his or her maximum heart rate for at least 30 minutes a day 3 days a week calculate the range of pulse rate for this level of exercise.

ian gone lie this got me confused

step-by-step explanation:

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)