Quick questions on Scattergraphs and the line of best fit: correlation and prediction - SQA National 5 Maths

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

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Points fall from upper left to lower right. What correlation is this? [1 mark]

What is q2?

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A line of best fit passes through

(0, 2)

and

(5, 17)

. Find its equation. [2 marks]

What is q3?

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Use

y = 3x + 2

to estimate

y

when

x = 4

. [1 mark]

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