Functions and Graphs

Functions and Graphs

Secondary 3

5 marks

Sketch \(y = -x^2 - 2x + 8\). Find its intercepts, axis of symmetry and turning point. State the range of \(y\).[5]

Solution:

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Answer:\(x\)-intercepts: \((-4,0),(2,0)\); \(y\)-intercept: \((0,8)\); Axis of symmetry: \(x=-1\); Turning point: \((-1,9)\); Range: \(y\le9\).

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