Question

I really need help on a few problems

Answer 1

1. How many gallons does the train use per mile?
2. What is the slope of the graph?

Answer 2

2 gallons per mile

Answer 3

How did you get that? @MinecraftNoob

Answer 4

Do 400(gas) divided by 200(miles)

Answer 5

Based on the graph, you know that 50 miles means 100 gallons are used. Therefore, by logic, there are 2 gallons used up in every mile.
For the slope, use this:\[Slope=\frac{ (y _{2}-y _{1}) }{ (x _{2}-x _{1}) }\]
Use random points, for example, (50,100) and (100,200).....
\[\frac{ 200-100 }{ 100-50 }\]
This reduces to:
\[\frac{ 100 }{ 50 }\]
You simply do the division and get 2. The slope is 2. :D