The accompanying graph shows the heart rate, in the beats per minute, of a jogger during a 4 minute interval. What is the rage of the jogger's heart rate during this interval?

The range of the jogger's heart rate is defined by the interval from the minimum value to the maximum value, where we can have values in the y-axis.
Looking at the graph, the minimum heart rate is 60 bpm, and the maximum is 110 bpm, and we can have any value inside this interval.
So the range is:
[tex]\text{range}=\lbrack60,110\rbrack[/tex]