The following graph belongs to the function $f(x)$. For which values of $x$ is the function increasing?

$x\leq 0$ and $x \geq 1$
$x\leq 0$
$x<0$
The correct answer is not among the other options.
The following graph belongs to the function $f(x)$. For which values of $x$ is the function increasing?

Antwoord 1 correct
Correct
Antwoord 2 optie
$x\leq 0$
Antwoord 2 correct
Fout
Antwoord 3 optie
$x<0$
Antwoord 3 correct
Fout
Antwoord 4 optie
The correct answer is not among the other options.
Antwoord 4 correct
Fout
Antwoord 1 optie
$x\leq 0$ and $x \geq 1$
Antwoord 1 feedback
Correct: On both intervals it holds that $f(x+\Delta x) \geq f(x)$ for every $x$ in the interval $\Delta x>0$.

Go on.
Antwoord 2 feedback
Wrong: Increasing is defined non-strict.

See Monotonicity.
Antwoord 3 feedback
Wrong: Increasing is defined non-strict.

See Monotonicity.
Antwoord 4 feedback
Wrong: The correct answer is among them.

Try again.