The cost of an lcd tv dropped from $825 in 2012 to $575 in 2014. construct a linear model to predict the cost of an lcd tv and use it to predict the cost of a tv in 2015.

The cost of an LCD TV dropped from $825 in 2012 to $575 in 2014

Since it is a linear model, the rate of change of cost is constant

So rate of change (slope) = = -125

To find the cost of every year we subtract 125 from the cost of previous year

In 2014, the cost of an LCD TV = $575

In 2015, the cost of LCD TV  = $575 - 125 = $450

the cost of a TV in 2015 is $450

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.