People seem to like movies about comic book heroes. the histograms below show the gross revenue (in hundreds of millions of dollars) of movies based on heroes from the two most popular comic book companies.

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.