Foundation November 2020 Paper 3 Q16
16 Solve \(3x + 4 \lt 19\).
Show your solution on the number line.
[4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(x \lt 5\) | 4 | B2 for \(x \lt 5\) or M1 for \(3x \lt 19 - 4\) or better | Solution to inequality: Allow M1 for this expression with other inequality symbols or equals sign or [\(x =\)] 5 as solution (can be implied by mark/circle on the diagram) or trials leading to selection of 5 or final correct trial using 5 |
AND | AND B2FT for \(x \lt 5\), or their inequality, correctly shown or B1 for \(x \lt 5\), or their inequality, correctly shown with a hollow circle and wrong arrow or filled circle and correct arrow | Displaying the solution: Display must show an inequality that fits on the number line for FT Mark to candidate’s advantage either \(x \lt 5\) or their inequality Accept an arrow of any length or a line reaching 1 If no solution to inequality seen: Hollow circle at 5 arrow to left M1B2 Filled circle at 5 arrow to left M1B1 Hollow circle at 5 arrow to right M1B1 Filled circle at 5 arrow to right M1B0 Mark at 5 no line or arrow M1B0 Circle and/or arrow at other than 5 M0B0 | |