Graph y<=x^2-4x+2

$y \leq x^{2} - 4 x + 2$

The equation is not linear, so a constant slope does not exist.

Not Linear

Graph a solid line, then shade the area below the boundary line since $y$ is less than $x^{2} - 4 x + 2$ .

$y \leq x^{2} - 4 x + 2$