Respuesta :

Answer:

The rate of change is $15/day

Step-by-step explanation:

The rate of change, using the points (1,60) and (5,120)

m= (y2-y1) / (x2-x1)

  = (120-60)/ (5-1)

  = 60/4

  = 15

The rate of change is $15/day