In what years will the percent be greater than 52?

Question

The percent of household in the U.S. with internet access is given by y=6.9x-3.18, where x is the number of years from 1995. in what years will the percent be greater than 52?

Answer 1

This problem states everything you need to know.

 

They give you a formula for the percent.

 

They tell you they want to know when the percent will be greater than 52.

 

So do just what they tell you:  Set the formula to be > 52 and see what happens.

 

6.9x - 3.18 > 52

6.9 x > 55.18

 

x > 7.997

 

That means that as long as the year is greater than 7.997, the percent will be greater than 52.  Since time only increases as we go forward, that means that once we get to 7.997 years (which is very close to 8), the percentage will be greater than 52.