<em>Note: You may have unintentionally missed to add the diagram, so after a little research I was able to find the diagram, which anyways would help you clear your concept.</em>
Answer:
The function shown in the graph is
.
Step-by-step explanation:
From the graph, it is clear that
when x = 0, y = -5
also when x = 2, y = 1
so

as
putting (0, -5)



also putting (2, 1)



So, the points (0, -5) and (2, 1) lies on the line
.
Also





Therefore, the function shown in the graph is
.