Question

Luiza bought a gas can for $18.50 at the gas station. She put gas in the can that cost $3.50 per gallon. All together, Luiza spend $32.50 for the gas and the gas can. Which number line shows the number of gallons of gas she put in the can?

Answer 1

Where are the number lines?

Otherwise just form an equation:
$32.50=$18.50+$3.5g where g is # of gallons
Find g and match it to the corresponding number line