SOLUTION: Mike bought a laptop for 2000$ after 6 years it is worth 200$ What is the linear question What is the laptop worth after 4 years

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Mike bought a laptop for 2000$ after 6 years it is worth 200$ What is the linear question What is the laptop worth after 4 years       Log On


   

Question 1070779: Mike bought a laptop for 2000$ after 6 years it is worth 200$
What is the linear question
What is the laptop worth after 4 years

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
This is a straight line that goes down from left to right
( decreases )
Let +v+ = the value of the laptop after +t+ years
The v-intercept is +200+ at +t=0+
The slope of the line will be negative. It is +%28+200+-+2000+%29+%2F+6+
+-1800%2F6+=+-300+
The equation is:
+v+=+-300t+%2B+2000+
---------------------------
After 4 yrs, it is worth
+v%284%29+=+-300%2A4+%2B+2000+
+v%284%29+=+-1200+%2B+2000+
+v%284%29+=+800+
$800
---------------------------
check:
+v%286%29+=+-300%2A6+%2B+2000+
+v%286%29+=+-1800+%2B+2000+
+v%286%29+=+200+
OK