Answer:
<h2>A.</h2>
Step-by-step explanation:
If gasoline costs $3.00 per gallon, then the complete table would be
Number of Gallons Purchased Total Cost
0 0
6 $18.00
12 $36.00
Now, we have to choose the graph that shows these pairs as points.
Among the options, graph A is the one that shows the linear relation. However, you could see that this graph doesn't show the exact given, but it shows the right ratio of change.
Notice that from the given table, the ratio of change is 3, that is, if you divide 18\6 = 3 and 36\3 = 12. This ratio of change represent the cost per gallon of the gasoline.
So, the graph A shows this ratio of change, because for 2 gallons, there's a cost of $6, and for 4 gallons the cost is $12. Both of them have the same ratio of change 3.
Therefore, the right answer is A.