Use a straight edge, such as a ruler, to compare with the graph.
Linear function.
Practice makes perfect
The graph of a linear function is portrayed as a single, straight line in a coordinate plane. One way to determine if the given graph is linear is by comparing it with a straight edge, such as a ruler.
We can see that all parts of the given graph lie on the same straight line. Because of this, we can conclude that the function is linear.
