Algebra 8

2 marks · Easy

Let the function f be defined by with domain . Find the range of f.

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{1, 9, 25}

Also accept: The range is {1, 9, 25}.; Range: {1, 9, 25}

Common mistakes: Giving just the procedure not the actual set of values.

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Marking points

M1 · 1 mark · Correctly substitutes each domain value into f(x).

A1 · 1 mark · For the complete and correct set of range values {1, 9, 25}.

Worked solution

Substitute 1: .

Substitute 3: .

Substitute 7: .

So the range is {1, 9, 25}.