Answer:
A Cadillac travels at 70 mph. A Buick travels at 60 mph. How long does it take to a Cadillac to catch up the Buick that started travelling one hour earlier?
Explanation:
A Table strategy needs an understanding of the problem. In addition to this strategy provides a clear vision of the problem.
Let's write it in a row, for the Cadillac. The second one for the Buick.
Plugging in values, here it is a Table like

Since the smallest distance between them is given in 6 hours, (10 miles). This is clearly the answer.
Each movement can be described as a function the Cadillac
y=70x
And the Buick: y=60x
And plugging values for x, you can test it alternatively than using table strategy.