Solution
Step 1
Write an equation for the speed in the situation
[tex]\text{Speed}=\frac{dis\tan ce}{\text{time}}[/tex]Step 2
Define the terms and substitute them into the equation and fine the time
[tex]\begin{gathered} \text{Speed}=\text{ 55miles per hour} \\ \text{distance = 18 miles} \\ Time=\text{ }\frac{dis\tan ce}{\text{speed}} \\ \text{Time}=\frac{18}{55}hrs \end{gathered}[/tex]Therefore, the dependent variable for the function that represents this situation is the distance