Drawing a scatter plot for the given values on a graphing calculator, we have;
How can the function that best represents the data be found?
The values are;
Day; Running time
1; 8.2
2; 8.1
3; 7.5
4; 7.8
5; 7.4
6; 7.2
7; 7.1
Entering the above values in a graphing calculator, we have;
- The slope of the line of best fit = -0.19
- The x-intercept = 45
Therefore;
- 0 = -0.19 × 45 + y-intercept
0 = -8.36 + y-intercept
The equation found using the statistics function for scatter plot on a calculator is therefore;
Learn more about scatter plots here:
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