Lesson Activities Forums Teacher’s Discussion Forum Equation of the regression line

This topic contains 1 reply, has 3 voices, and was last updated by  Chris Clarke 7 years, 4 months ago.

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• #1410

Chris Clarke
Participant

Where does it say this? I’m slightly confused by the question.

I assume that you have been given the line of regression of the form y = A + Bx.

The line is a mathematically calculated ‘line of best fit’ designed to minimise how far the different data points are away from it, on average. It is therefore not guaranteed to go through any of the data points. It does however go through the x-mean and y-mean coordinate point.

• #1416

Ntyatyi Ndarala
Participant

In one of assignments we’ve determined the equation of the regression line,then we were given the y value and asked to calculate the x value then on our notes ‘we are not to use the equation ‘i need a clarity why?

• #1503

Anonymous

Hi Ntyatyi
If the question says do not use the equation then the only other option is to read the value off from the graph. Usually we are allowed to use the equation.
Barrie

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