On a trip across the country Joe used 20 gallons of gas to go 300 miles. At this rate, how much gas must he use to go 3600 miles? HELP

240 gallons

Step-by-step explanation:

Let's set up an ratio where g = gallons and m = miles:

20g = 300m

We need the right side of that to be 3600, so multiply both sides by 12:

12(20g) = 12(300m)

240 gallons for 3600 miles

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!