Hello and Good Morning/Afternoon
Let's take this problem step by step:
To find the rate of change is essentially like finding a line's slope:
⇒ the x-values are the number of sodas
⇒ the y-values are the total costs
⇒ choose two sets of coordinates and find the slope
Let's put that into action
⇒ (24, 18)
⇒ (28, 21)
[tex]Rate_.of_.change = \frac{21-18}{28-24} =\frac{3}{4}[/tex]
Since the rate of change is total cost over number of sodas
⇒ unit is 'total cost/number of sodas'
Answer: 3/4 total cost/number of sodas
Hope that helps!
#LearnwithBrainly
