Final answer:
To determine if Matthew uses gas at the same rate as shown in the graph, calculate his gas mileage and compare it to the rate in the graph.
Step-by-step explanation:
To determine if Matthew uses gas at the same rate as shown in the graph, we need to compare his gas mileage to the rate shown in the graph. Gas mileage is typically measured in miles per gallon (mpg).
To calculate Matthew's gas mileage, we can use the formula: Gas mileage = Total miles driven / Total gallons of gas used. In Matthew's case, gas mileage = 320 miles / 15 gallons = 21.33 mpg.
Now, we can compare this value to the rate shown in the graph.