Question

Christopher's car can hold 17 gallons of gas. The given table shows the amount of gas used by the car based on the number of hours it travels. Which of the following statements is correct and how many gallons of gas will be used if the car travels for 8 hours?

$\begin{array}{ccccc}\text{Time (hours)}& 1& 2& 3& 4\\ \text{Quantity of gas}& 2& 4& & \\ \text{used (gallons)}& & & & \end{array}$

• A. Quantity of gas used (in gal) is the same as the travel time (in h). So, 8 gal will be used in 8 h.
  
• B. Quantity of gas used (in gal) is half the travel time (in h). So, 4 gal will be used in 8 h.
• C. Quantity of gas used (in gal) is one more than the travel time (in h). So, 9 gal will be used in 8 h.
• D. Quantity of gas used (in gal) is twice the travel time (in h). So, 16 gal will be used in 8 h.
  

Answer 1

The correct option is D Quantity of gas used (in gal) is twice the travel time (in h). So, 16 gal will be used in 8 h.


Quantity of gas used in 1 h = 2 gal
Quantity of gas used in 2 h = 4 gal
The pattern is:
1 $\times$ 2 = 2
2 $\times$ 2 = 4
3 $\times$ 2 = 6
4 $\times$ 2 = 8

We can see that the quantity of gas used (in gal) is twice the travel time (in h). So, 16 gal of gas will be used in 8 h.