Answer:
d = 200m
1400 m.
Explanation:
This is direct variation.
At time 0 distance run is zero.
d = km where d = distance, m = time and k is a constant.
k = the slope of the line joining the points and is
800 / 4
= 200.
So the equation is d= 200m.
After 7 minutes he has run 20*7
= 1400 meters.