The equation y 135x 100 estimates the amount that business

The equation y = 13.5x + 10.0 estimates the amount that businesses will spend, in billions of dollars, on a certain business technology, where x is the number of years after 2004. For what years will the spending be more than $64 billion?

Spending will be more than $64 billion more than ____________ years after 2004.

Solution

y = 13.5x + 10.0 estimates the amount that businesses will spend, in billions of dollars

Now when is y = $64 billion

So, plug y = 64

64 = 13.5x + 10

13.5x = 54

x = 54/13.5 = 4

So, year = 2004 +4 = 2008

Spending will be more than $64 billion more than _______4_____ years after 2004.