Practice problem
Which of the following describes the solutions (x,y)(x,y)(x,y) to the nonlinear inequality y2−2xy+x2≤0y^2 - 2xy + x^2 \le 0y2−2xy+x2≤0?
half-plane
strip in the plane (region between two parallel lines)
line
disk
region above a parabola
Type a concept, like “slope” or “photosynthesis”.