The correct one-variable, one-step equation that represents the situation is:
\( i = 48 + 2 \)
Since Izzy has two more baseball cards than Josh, and Josh has 48, you can rewrite the equation as:
\( i = 50 \)
However, if you need an equation in the form provided in your options, the correct representation would be:
\( i - 2 = 48 \)
This form shows that if you subtract 2 from Izzy's cards (i), you will find the number of cards Josh has (48). Therefore, the answer from your options is:
i - 2 = 48