Question

A different car can travel 30.5 miles for every gallon of gas used.

Use proportional reasoning to find the value of x that completes the table showing this relationship.

Answer 1

Please make sure to include the table next time

Answer 2

We're trying to find x here

You want the same value type on the same side of the fraction

You can have
\(\dfrac{miles}{gallons}=\dfrac{miles}{gallons}\)

In each fraction you want to have the corresponding value

For x miles, we were given 3 gallons. So you can substitute that into one "fraction"

\(\dfrac{x~mi}{3~gallons}=\dfrac{miles}{gallons}\)

For the second "fraction" you can choose any point given in the table