A school district pays an installation fee and a monthly fee for internet service. The table shows the total cost of internet service for the school district over different number of months. Explain why the situation can be modeled by a linear equation. What is the installation fee. What is the monthly service fee?
Months of service=2,4,6,8,10,12
Total cost dollars=9378,12806,16234,19662,23090,2651

Question

e.cociuba · Answer

When talking about linear equation meaning to say that it is proportional 
example 
in 2 months the price = 9,378 & for 4 month the price will be = 12,806 
if this is linear then if we are going to find the amount for 4 months 

2 mon/ 9,378 = 4 mon / x 
if x = 12,806 then this is linear equation 

but in your problem 
x = 4 ( 9,378) / 2 
x = 19,000 ← this is not equal to 12,806 

What is the installation fee? 
= The Total payed amount minus(-) corresponding monthly payment of services(from the table) 

What is the monthly service fee? 
= It will be found in the table under the corresponding choice of month.