Matching and Verification: Equation A: y = x² Substitute x = -2: y = (-2)² = 4 (matches the table) Substitute x = 0: y = (0)² ...

Sometimes in mathematics we like to use letters to represent numbers. The ‘value’ of these letters can change according to certain rules or conditions we are given – hence we can call them variables.

Check Your Work: After completing the table, take the time to review your calculations. One way to check your work is to plot the points from the table on a graph. If the points don't form a pattern ...