can we get slides for theory part explained in machine learning course for future reference ?

Hi Vikas,
Sure! They are available with the lectures from that course.
Regression analysis: https://learn.365datascience.com/courses/machine-learning-in-python/introduction-to-regression-analysis
Logistic regression: https://learn.365datascience.com/courses/machine-learning-in-python/introduction-to-logistic-regression
Cluster analysis: https://learn.365datascience.com/courses/machine-learning-in-python/introduction-to-cluster-analysis

Best,
Iliya