(i) Working with a classmate, graph each of the following graphs in the domain − 3 ≤ x ≤ 3, where x ∈ ℝ, using the method in the example above. Graph A: y = x2 Graph B: y = x2
− 2x
Graph C: y = − x2 Graph D: y = − x2
− 2x
(ii) What shape are graphs A and B? (iii) What shape are graphs C and D? (iv) What do you think is determining the shape of the graphs?
(v) Discuss anything you have learned about quadratic graphs from carrying out this task with a classmate.