<PRE><B>Question 1043290</B>
A lamp is bought for $240 and sold six years later for $60. 
a) Find the depreciation equation. 
=======
You have 2 points:: (0,240) and (6,60)
------
slope = (60-240)/(6-0) = -180/6 = -30
--------
V(t) = -30t + 240
---------------------
Cheers,
Stan H.
--------------------</PRE>