Okay, let's see...
The problem is asking for a linear equation most likely in the form of y=mx+b
y is another way to say f(x)
<em>m = slope </em>
<em>b = y intercept </em>
Let's start with the y intercept first.
Y intercept means ' When does the line touch (intercept) the y axis.
In this case, if you look at the graph, the line <em>touches </em>the y axis at -1.
-1 will replaces b
To find the slope we are going to take 2 precise points from the graph.
Lets use <em>(0,-1)</em> and <em>(-6,4) </em>
To find the slope, we're going to use 
4 - (-1) / -6 - 0
Solve, our slope is 5/-6
That is our m
Our final equation is

Answer:
The answer would be A) 240 litres. This is because the question itself told us beforehand how much the tank can hold, which is 240.
Answer:
2, -3
Step-by-step explanation:
I think this is right.
Maybe just wait till someone else answers just to makae sure this is exactly the right answer.
The answer to the problem is B.
Answer:
Your answer is: Slope =
Y-intercept = 
Graph the line using the slope and y-intercept, or two points.
Step-by-step explanation:
Graph Below : ↓
Hope this helped : )