<PRE><B>Question 1083099</B>
When a van travels a maximum of 100 km per hour.
Assuming this is with driver only
:
 Its speed decreases in a proportion with the number of passengers.
 The van can carry a maximum of 7 passengers.
 Given that the van can travel 88 km per hour with 3 passengers in the van..
what will be the speed of the van when 6 passengers are on board 
:
linear equation form y = mx + b
pass|speed
  x | y
----------
  0 |100
  3 | 88
  6 | ?
:
x=0; we know the equation is y = mx + 100
when x=3, y=88,we can find m
3m + 100 = 88
3m = 88 - 100
3m = -12 
 m = -12/3
 m = -4
the equation: y = -4x + 100
find y when x = 6
y = -4(6) + 100
y = -24 + 100
y = 76 mph when carrying 6 passengers</PRE>