To express the relationship between the number of hours driven (\(h\)) and the total miles driven (\(m\)), you can use the equation:
\[ m = 65h \]
where \(m\) is the total miles driven and \(h\) is the number of hours driven.
To find out how far they drove after 7 hours, substitute \(h = 7\) into the equation:
\[ m = 65 \times 7 \]
Calculating that:
\[ m = 455 \]
So, they drove 455 miles after 7 hours.