Mathematics for IGCSE & O level - Inequalities (Section 1 - No. 7)
What is the key process for shading the correct region for an inequality on a graph?
Using a compass.
Using a protractor
Choosing a test point, and checking if it meets the inequality
Always shading above the line.
Wyjaśnienie
Choosing a point to test and see if it satisfies the equation or not.