Answer:
The unit rate is 15.
Explanation:
Time (hours)
6: $90 90/6 = 15
12: $180 180/12 = 15
18: $270 270/18 = 15
24: $ 360 360/24 = 15
You should find the unit rate by dividing y by x. I divided all of the y's by the x's and I got 15 for all of them, which means that the unit rate is 15.