Which statement best describes relationship between heart rate and time during exercise

The third option

Step-by-step explanation:

Because as you see in this graph,

the heart rate increases for 6 minutes,

then it remains constant for 19 minutes (25 - 6 =19),

and then decreased for 5 minutes(30 - 25 =5).

Hope this helps.. Good Luck!

solve 4/5 = x/10

40/5= x

x= 8

Step-by-step explanation:

solve 4/5 = x/10

cross multiply

4x10/5= x

40/5= x

X= 8