Answer:
$316 billions was the transaction volume in the year 2000.
Explanation:
Given:
The transaction volume V (in billions of dollars) of purchases made on debit cards in the United States can be approximated by the equation V = 133.4 x +316 , where x is the number of years since 2000.
Now, to find the transaction volume in the year 2000.
The number of years since 2000 =

And the transaction volume
(in billions of dollars) of purchases made on debit cards in the United States can be approximated by the equation:

As,
is the number of years since 2000.
Thus, the value of

Now, solving the equation by putting the value of
:

Therefore, $316 billions was the transaction volume in the year 2000.