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How can you write a linear function as word problem?

Answer:

The form of linear function is: y = ax + b. We have to determine a and b coefficients.

For example, we have two variables with their values which are displayed in two colunm.

The formulate for these coefficients as below:

a = sum of [(xi-xaverage)*(yi-yaverage)] / sum of [(xi-xaverage)2]

b = a*xaverage - yaverage

You need to calculate correlative coefficient r2. The formulate as below:

r2 = [(a*SD(xi)/SD(yi)]2

Where: SD - Standard Deviation.

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First answer by ID3416401041. Last edit by ID3416401041. Question popularity: 1 [recommend question].

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