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plz help

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https://vle.mathswatch.co.uk/images/questions/question1062.png

BOTH OF THEM NEED HELP ON QUESTION C

https://vle.mathswatch.co.uk/images/questions/question16320.png

May 2, 2020

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First question:

a)  Plot the point (4, 2600) on the graph.

b)  The relationship is linear with the older the car, the lesser value it has (the line has a negative slope).

c)  To estimate the value, plot these points on a sheet of graph paper, draw what you feel is the line through these data points that best represents the data (a "best-fit" regression line), and find the y-value of the point that is (3.5, something).

Second question:

a)  All of the points, except for one, is on a line from the lower left to the upper right. There is one point that is plotted away from the others, above the others, it is point (140, something)  -- this point is the outlier.

b)  The other points form a linear, positive, relationship (positive because the slope of the regresstion line is positive).

c)  Plot these points on a sheet of graph paper, draw what you feel is the best-fit line for these points, and then find where the line  y = 45 kg intercepts this line  -- this will give you his predicted height.

May 2, 2020