f(x) = x² is not a linear function.
What is a linear function?
Linear functions are those whose graph is a straight line. A linear function has the following form. y = f(x) = a + bx. A linear function has one independent variable and one dependent variable.
The graph of a linear function is a line
A) f(x) = -2 It is a line
B) f(x) = x - 2 It is a line
C) f(x) = 2x It is a line
D) f(x) = x² It is a parabola
From the given graph, we can se clearly f(x) = x² is a parabola
Hence, f(x) = x² is not a linear function.
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