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Answer :
Final answer:
To superimpose a trend equation on a scatter diagram, plot the data points and determine the equation of the line of best fit. Then, plot the equation on the scatter diagram to visualize the trend.
Explanation:
To superimpose a trend equation on a scatter diagram, follow these steps:
- Plot the data points on the scatter diagram.
- Observe the general trend of the data. Determine whether the relationship between the variables is linear, quadratic, exponential, or some other form.
- Choose a method to find the equation of the line of best fit. The most common method is the least squares method, which minimizes the sum of the squared differences between the observed data points and the predicted values on the line.
- Use the chosen method to calculate the equation of the line of best fit.
- Plot the equation on the scatter diagram. For a linear trend, the equation will be in the form y = mx + b, where m is the slope and b is the y-intercept.
By superimposing the trend equation on the scatter diagram, you can visually see how well the equation represents the general trend of the data. This can help in making predictions or analyzing the relationship between the variables.
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