Math Problem Statement

how to calculate m and d for a linear equation y=m*x+d using a dataset {{0.943396, 0.31746}, {0.458716, 0.37594}, {0.20284, 0.121507}, {0.096432, 0.0944287}, {0.025582, 0.0628536}, {0.0117041, 0.0618812}} in mathematica

Solution

To calculate the slope mm and intercept dd for a linear equation y=mx+dy = mx + d using the dataset provided in Mathematica, you can follow these steps:

  1. Input the dataset: Define the dataset as a list of points.
  2. Use LinearModelFit: This function fits a linear model to the data and returns a model object from which you can extract the slope mm and intercept dd.
  3. Extract the parameters: Extract the slope and intercept from the model.

Here’s how you can do it:

mathematica
(* Step 1: Input the dataset *) data = {{0.943396, 0.31746}, {0.458716, 0.37594}, {0.20284, 0.121507}, {0.096432, 0.0944287}, {0.025582, 0.0628536}, {0.0117041, 0.0618812}}; (* Step 2: Use LinearModelFit to fit a linear model to the data *) model = LinearModelFit[data, x, x]; (* Step 3: Extract the slope (m) and intercept (d) *) m = model["BestFitParameters"][[2]]; (* slope *) d = model["BestFitParameters"][[1]]; (* intercept *) (* Output the results *) {m, d}

Explanation:

  • data: This is your list of points (xi,yi)(x_i, y_i).
  • LinearModelFit[data, x, x]: Fits the linear model y=mx+dy = mx + d to the data, where xx is the independent variable.
  • model["BestFitParameters"]: This returns a list where the first element is the intercept dd, and the second element is the slope mm.

Result:

Running this code in Mathematica will give you the numerical values of mm (slope) and dd (intercept).


Do you want more details or have any questions? Here are some related questions you might find interesting:

  1. How to plot the fitted line along with the original data points in Mathematica?
  2. How to calculate the goodness of fit (R²) for the linear model?
  3. How to perform a multiple linear regression in Mathematica?
  4. What are some other ways to fit a linear model besides LinearModelFit?
  5. How to interpret the slope and intercept in the context of your data?

Tip: When working with linear regression, always check the residuals (differences between observed and predicted values) to assess the model's accuracy.

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Math Problem Analysis

Mathematical Concepts

Linear Regression
Least Squares Method

Formulas

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Theorems

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Suitable Grade Level

Advanced