In the number plane, points that lie on broken lines are part of the solution to the inequality.
For a solid line in the number plane, any point that lies on the line is included in the solution to the equation of the line.
Write down the inequality that describes the points in the shaded region.
Write the inequality that describes the points in the shaded region.
Form and solve linear equations and inequations, quadratic and simple exponential equations, and simultaneous equations with two unknowns
Apply algebraic procedures in solving problems