Answer:
D. $0.40 per minute
Step-by-step explanation:
Ken represented by the blue chart
So, the unit rate = cost over the time
From the blue chart we will choose two points to find the rate:
The points will be (0,0) and (25,10)
So, unit rate = (10-0)/(25-0) = 10/25 = $0.4
The answer is option D. $0.40 per minute
