What is the identity function graph? The identity function is a particular case of the affine function f(x) = a.x + b, where a = 1 and b = 0. The identity function is a function of f : ℝ→ℝ of the form of f(x) = x , where x is a real number and x ≠ 0.
What is the identity function graph?
The graph of an identity function is a straight line that crosses the point (0 , 0). For example, in the function f(x) = x, the graph will be a straight line that crosses the point (0 , 0) and will have a slope of 45º.
To plot the graph, one can build a table to find the points:
Notice that the points are identical, and then plot the graph as below :
