To predict the cost of traveling 70 miles using the given line of best fit equation \( y = 0.37x + 5 \):
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Substitute \( x = 70 \) into the equation: \[ y = 0.37(70) + 5 \]
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Calculate \( 0.37 \times 70 \): \[ 0.37 \times 70 = 25.9 \]
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Now, add 5 to this result: \[ y = 25.9 + 5 = 30.9 \]
Thus, the cost to travel 70 miles would be $30.90.
So the answer is: It would cost $30.90 to travel 70 miles.