The graph is a piecewise defined function.
Observe the graph.
A straight line exists in the interval .
The end points of the straight line are and .
Standard form of line equation using the points and is .
Substitute and in the line equation.
The equation of the line is in the interval .
Observe the graph.
A straight line exists in the interval .
The end points of the straight line are and .
Standard form of line equation using the points and is .
Substitute and in the line equation.
The equation of the line is in the interval .
Then the piecewise function is .
The function is .
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