To represent the relationship between the number of brownies sold (\(b\)) and the total sales from brownies (\(s\)), we can use the equation:
\[ s = 1.5b \]
In this equation, \(s\) is the total sales in dollars and \(b\) is the number of brownies sold at $1.50 each.
Now, if the club sells 25 brownies, we can substitute \(b = 25\) into the equation:
\[ s = 1.5 \times 25 \]
Calculating that gives:
\[ s = 37.50 \]
Thus, the total sales from selling 25 brownies would be $37.50.
The correct response is: s = 1.5b; $37.50.