| Exam Board | WJEC |
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| Module | Unit 1 (Unit 1) |
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| Year | 2024 |
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| Session | June |
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| Topic | Quadratic Functions |
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16. (a) Find the range of values of \(k\) for which the quadratic equation \(x ^ { 2 } - k x + 4 = 0\) has no real roots.
(b) Determine the coordinates of the points of intersection of the graphs of \(y = x ^ { 2 } - 3 x + 4\) and \(y = x + 16\).
(c) Using the information obtained in parts (a) and (b), sketch the graphs of \(y = x ^ { 2 } - 3 x + 4\) and \(y = x + 16\) on the same set of axes.