Brainlag PlusPlot quadratic graphs from a table, read roots and turning points off them, sketch from factors and solve inequalities.
From table to curve
Substitute each x into the equation.
Brackets stop the classic slip with negatives: (−2)² = 4, not −4.
This is y = x² − 2x − 3. Join the points with a smooth curve: a U shape (the x² term is positive), with no flat bottom and no straight bits.
The rest of this lesson and its 8 practice questions are in Plus.
Screen 1 of 4, free to read.
- 8 exam-style questions, marked as you go, each with a worked solution
- The Graph Plotter beside every question
- Anything you get wrong is saved to your flashcards