To find the cost of traveling 70 miles using the equation of the line of best fit given by \( y = 0.37x + 5 \), you need to substitute \( x \) with 70.
\[ y = 0.37(70) + 5 \]
First, calculate \( 0.37 \times 70 \):
\[ 0.37 \times 70 = 25.9 \]
Now add 5:
\[ y = 25.9 + 5 = 30.9 \]
Therefore, the cost to travel 70 miles would be \( y = 30.9 \).
In exact change, that would be $30.90.