Graphs common mistakes

Common mistakes

• Coordinates common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Work with coordinates in all four quadrants..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Coordinates.

• Straight-line graphs common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Plot graphs of equations corresponding to straight lines in the coordinate plane..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Straight-line graphs.

• Straight-line graphs common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Use y = mx + c to identify parallel lines and find equations of lines from points and gradients..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Straight-line graphs.

• Straight-line graphs common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Use y = mx + c to identify perpendicular lines..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Straight-line graphs.

• Gradients and intercepts common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Identify and interpret gradients and intercepts of linear functions graphically and algebraically..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Gradients and intercepts.

• Quadratic graph features common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Identify and interpret roots, intercepts and turning points of quadratic functions graphically..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Quadratic graph features.

• Quadratic graph features common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Deduce quadratic roots algebraically and deduce turning points by completing the square..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Quadratic graph features.

• Sketching and interpreting function graphs common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Recognise, sketch and interpret graphs of linear and quadratic functions..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Sketching and interpreting function graphs.

• Sketching and interpreting function graphs common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Include simple cubic and reciprocal functions where tier-appropriate..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Sketching and interpreting function graphs.

• Sketching and interpreting function graphs common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Include exponential functions and trigonometric functions with degree arguments..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Sketching and interpreting function graphs.