Table:
regression equation
r2

moderate-to-vigorous physical activity
y = 0.78x + 15.76
0.85

light physical activity
y = 0.72x + 6.67
0.85

sedentary time
y = 1.03x + 67.20
0.83

total counts per day
y = 0.91x + 17,229
0.87

Statement: nonetheless, 15- and 60-second epoch data are highly correlated.
Question: what is the minimum and maximum of r2?
Answer: [0.83, 0.87]