Respuesta :
Number of Laps 2, 4, 6, 8, 10
Time (Min) 10, 20, 30, 40, 50
the laps and mins go up at a constant rate.
2-4 is a difference of 2, as they all are
10-20 is a difference of 10, as they all are.
for half way between 6 and 8 is 7 which would be half way between 30 and 40 which is 35 mins
so 7 laps is 35 mins (that's a big track!)