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4. A shopkeeper sells pens in his shop. He sells the pens for a different cost price for six weeks. He notes the
number of pens, y, sold each week. The results are shown in the table below:
x (cost price) 15 20 25 30 35 40
y (no. of pens sold) 65 60 55 45 38 35
Plot the scatterplot for the above using MS Excel. Also find out the regression equation using Excel.
5. Visit the website https://playground.tensorflow.org/ and execute classification or
regression datasets. You can change the circled values and then click on play button to
see the working of the model.
Each concept is the same as used in Teachable Machine.
6. Use the Linear Regression Calculator to find the 'Line of Best Fit'. Go to
https://www.graphpad.com/quickcalcs/linear1/. Enter the values of x and y,
then click on 'Calculate Now' to visualise the scatterplot.
Answers
Quiz
1. a 2. c 3. c 4. a 5. c 6. a 7. a 8. d 9. c 10. b
Exercise
A. 1. Machine learning 2. Dimensionality reduction 3. higher 4. Outlier
5. beforehand/prior 6. Anomaly detection 7. Distribution-based clustering
8. Clustering 9. Simple linear regression 10. supervised learning
B. 1. True 2. True 3. True 4. True 5. True 6. False 7. False
8. True 9. True 10. False
Machine Learning Algorithms 365

