4) What is the cost per bubble? Find the rate of change. 4)) rate of change: square

To find the cost per bubble, we need to determine the rate of change. The rate of change is the difference in the y-values divided by the difference in the x-values.Step 1: Find the difference in the y-values:The y-values are 0.25, 0.5, 0.75, and 1. The differences between consecutive y-values are 0.5 - 0.25 = 0.25, 0.75 - 0.5 = 0.25, and 1 - 0.75 = 0.25.Step 2: Find the difference in the x-values:The x-values are 1, 2, 3, and 4. The differences between consecutive x-values are 2 - 1 = 1, 3 - 2 = 1, and 4 - 3 = 1.Step 3: Calculate the rate of change:Divide the difference in the y-values by the difference in the x-values: 0.25 / 1 = 0.25.Therefore, the rate of change is 0.25.Answer: rate of change: 0.25