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Compute r and the least-squares line from data

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Question 1 of 8

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The aim is to predict fitness test total from weekly training distance. Use technology with the data below

weekly training distance (km)fitness test total (points)
72357
75363
78367
79365
81373
82383
85403
88421
Scatterplot with 8 points. The horizontal axis is weekly training distance (km) and the vertical axis is fitness test total (points). The observed weekly training distance values run from 72 to 88, and the observed fitness test total values run from 357 to 421. The plotted response values generally increase as the explanatory values increase.758085360380400420weekly training distance(km)fitness test total(points)
(a)1 mark

Which variable should be entered as x for this regression?

(b)2 marks

Find a and b for the least-squares model of fitness test total on weekly training distance. Give both values to 2 decimal places

Use the form: predicted fitness test total = a + b × weekly training distance