Answer
Linear functions are antiderivatives of constant functions.
Work Step by Step
If $F(x)$ is an antiderivative of $f(x)$, that is $ F'(x)=f(x)$, then the indefinite integral of f is
$\displaystyle \int f(x)dx=F(x)+C.$
If $ F(x)=ax+b$ (a linear function), then $ F'(x)=a$ (a constant function).
So, linear functions are antiderivatives of constant functions.
