Answer:
$12 Q1 + $4 Q2 = $48
Explanation:
given data
budget = $48
movie tickets Q1 increased = $9 to $12 per person
skating Q2 decreased = $5 to $4 per person
solution
When the price of movie = $9
than price of roller skating is $5
so budget constraint will be as
$9 Q1 + $5 Q2 = $48
and when price change in increase in Q1 and decrease in Q2
so new budget constraint will be here
$12 Q1 + $4 Q2 = $48