Answer:
2km/m
Step-by-step explanation:
6 laps = 10km
(because 3 x 2 = 6 and double 5km as well)
Distance divide time = speed
20 mins divided by 10km = 2km per minute
y = -x + 3
3x+6=18
3x=18-6
3x=12
x=4
the graph is a straight line through the origin
a constant
