Rae earns $60 for playing music on Saturday nights at the local coffee house. She makes an average of $5.25 in tips per hour. Write the function of Rae's earnings, and solve for how much she would make after 4 hours. (1 point)

y = 5.25x + 60; $65.25
y = 60x + 5.25; $85.75
y = 5.25x + 60; $81.00
y = 60x + 5.25; $185.25