Question 13 of 18 in Graphs 8

Graphs 8

2 marks · Normal

Write down the algebraic equation for the graph that results from stretching by a scale factor of 4 in the y-direction.

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y = 4h(x)

Also accept: y = 4h(x)

Common mistakes: Writing y = h(4x)

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Marking points

B1 · 2 marks · Gives correct equation . Allow equivalent forms.

Worked solution

A stretch in the y-direction by factor 4 multiplies the whole function by 4: .

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