Janelle spends all of her $40 income on songs from iTunes ($1 each) and applications ($4 each) for her iTouch. What is her budget equation?

Question

Quizplus · Accepted Answer

Janelle's budget equation is based on spending all $40 on songs and applications. Each song costs $1 and each application costs $4. Therefore, the equation is $1 × Qsong + $4 × Qapp = $40. Solving for Qapp gives Qapp = 10 - 1/4 × Qsong.

Janelle Spends All of Her $40 Income on Songs from ITunes