Problem
(1)) Mateo puts 6 gallons of gas in his car and pays \( \$ 15 \). (1) What is the cost of 7 gallons of gas? Complete the table. \begin{tabular}{|c|c|c|c|} \hline Cost (dollars) & 2.50 & 15 & \( \mid \) \\ \hline Gas (gal) & 1 & 6 & 7 \\ \hline \end{tabular}
Solution
Step 1 ：\( \frac{15}{6} = 2.50 \)
Step 2 ：\( 7 \times 2.50 = 17.50 \)
Step 3 ：\begin{tabular}{|c|c|c|c|} \hline Cost (dollars) & 2.50 & 15 & 17.50 \\ \hline Gas (gal) & 1 & 6 & 7 \\ \hline \end{tabular}
