To set up the equation, we need to relate the cost per pound of peaches to the total amount Charity has to spend. The cost of peaches is $1.30 per pound, and she can spend up to $6.50.
The proper equation representing this situation is:
\[ 1.30x = 6.50 \]
where \( x \) is the number of pounds of peaches Charity can buy.
So the correct choice is: A. \( 1.30x = 6.50 \).