Basically think of linear functions/equations as something with a constant value or consistent result. For example: (Attachment)
The attached graph represents the solution set of 
<h3>How to determine the graph?</h3>
The complete options are not given.
So, I would plot the graph that represents the solution set
The inequality is given as:

Start by splitting the inequalities as follows:


The above means that we plot the graphs of f(x) and g(x) to represent the solution set
See attachment
Read more about inequalities at:
brainly.com/question/25275758
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Where is the picture of the triangle?
Parallel = same slope
Slope would be 1/4
Pass through (0,0)
Solution: y = 1/4x
Here, this website explains it perfectly
Step-by-step explanation:
https://www.k5learning.com/blog/subtracting-positive-and-negative-numbers